In 1080 Stephen Blois II Count Blois and Chartres (age 35) and Adela Normandy Countess Blois (age 13) were married at Chartres [Map]. She by marriage Countess Blois. The difference in their ages was 22 years. She the daughter of King William "Conqueror" I of England (age 52) and Matilda Flanders Queen Consort England (age 49). He the son of Theobald Blois III Count Blois (age 68) and Gersenda Maine Countess Blois. They were third cousins.

In 1087 Alan Canhiart IV Duke Brittany (age 24) and Constance Normandy Duchess Brittany (age 30) were married. She by marriage Duchess Brittany. She the daughter of King William "Conqueror" I of England (age 59) and Matilda Flanders Queen Consort England. They were third cousins.

In 1127 William Clito Normandy Count Flanders (age 24) and Joanna Monferrat Countess Essex were married. She by marriage Countess Essex. She the daughter of Rainier Aleramici Marquis of Monferrat (age 43) and Gisela Ivrea Countess Savoy (age 57). He the son of Robert Curthose III Duke Normandy (age 76) and Sybilla Conversano Duchess Normandy. They were third cousins. He a grandson of King William "Conqueror" I of England.

In 1160 Matthew Metz Count Boulogne and Marie Blois I Countess Boulogne (age 24) were married. He the son of Thierry Metz Count Flanders (age 61) and Sibylla Anjou Countess Essex and Flanders (age 48). They were third cousins. She a great granddaughter of King William "Conqueror" I of England.

In 1170 Matthew Metz Count Boulogne and Marie Blois I Countess Boulogne (age 34) were divorced.

23 May 1200 Louis "Lion" VIII King France (age 12) and Blanche Ivrea Queen Consort France (age 12) were married. She the daughter of Alfonso VIII King Castile (age 44) and Eleanor Plantagenet Queen Consort Castile (age 38). He the son of King Philip II of France (age 34) and Isabelle Flanders Queen Consort France. They were third cousins. He a great x 3 grandson of King William "Conqueror" I of England. She a granddaughter of King Henry "Curtmantle" II of England.

Around Dec 1206 Hugh Bigod 3rd Earl Norfolk (age 24) and Maud Marshal Countess Norfolk and Surrey (age 12) were married. She the daughter of William Marshal 1st Earl Pembroke (age 60) and Isabel Clare Countess Pembroke (age 34). He the son of Roger Bigod 2nd Earl Norfolk (age 62) and Ida Tosny Countess Norfolk (age 50). They were third cousins.

Before 1209 William Mowbray 6th Baron Thirsk (age 36) and Avice D'Aubigny Baroness Okehampton Baroness Mowbray (age 12) were married. She by marriage Baroness Thirsk. The difference in their ages was 23 years. She the daughter of William D'Aubigny 3rd Earl Lincoln 3rd Earl Arundel (age 29) and Mabel Gernon Countess Lincoln and Arundel. They were third cousins. She a great x 3 granddaughter of King Henry I "Beauclerc" England.

In Mar 1211 Raymond Rouerge VII Count Toulose (age 13) and Sancha Barcelona Countess Toulose were married. She the daughter of Alfonso II King Aragon and Sancha Ivrea Queen Consort Aragon. He the son of Raymond Rouerge Marquess Provence (age 54) and Joan Plantagenet Queen Consort Sicily. They were third cousins. He a grandson of King Henry "Curtmantle" II of England.

In or before 1218 Gilbert Clare 5th Earl Gloucester 4th Earl Hertford (age 38) and Isabel Marshal Countess Cornwall, Gloucester and Hertford (age 17) were married. She by marriage Countess Gloucester, Countess Hertford. The difference in their ages was 20 years. She the daughter of William Marshal 1st Earl Pembroke (age 71) and Isabel Clare Countess Pembroke (age 45). He the son of Richard Clare 3rd Earl Hertford and Amice Fitzrobert Countess Hertford. They were third cousins. He a great x 2 grandson of King Henry I "Beauclerc" England.

Before 1235 Hugh Lusignan XI Count Lusignan VI Count La Marche II Count Angoulême (age 14) and Yolande Capet Countess Lusignan, La Marche and Angoulême (age 15) were married. She the daughter of Peter of Dreux aka Mauclerc Duke Brittany (age 47) and Alix Thouars Duchess of Brittany. He the son of Hugh Lusignan X Count Lusignan V Count La Marche (age 51) and Isabella of Angoulême Queen Consort England (age 46). They were third cousins. She a great x 4 granddaughter of King Henry I "Beauclerc" England.

On 12 Mar 1237 William Jülich IV Count Jülich (age 27) and Margaret Guelders Countess Jülich were married. She by marriage Countess Jülich. He would, thirteen years later, marry her sister Richardis Guelders Countess Jülich (age 22); an example of Married to Two Siblings. She the daughter of Gerard III Count Guelders and Margaret Reginar Countess Guelders. He the son of William Jülich III Count Jülich and Matilda Luxemburg Countess Jülich. They were third cousins. She a great x 4 granddaughter of King William "Conqueror" I of England.

On 14 Jun 1237 Robert Capet Count of Artois (age 20) and Matilda Reginar Countess Saint Pol (age 13) were married. She the daughter of Henry Reginar II Duke Brabant (age 30) and Marie Swabia Duchess Brabant. He the son of Louis "Lion" VIII King France and Blanche Ivrea Queen Consort France (age 49). They were third cousins. He a great grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King William "Conqueror" I of England.

In 1245 Theobald of Bar II Count of Bar (age 24) and Joanna Dampierre Countess Bar were married. She by marriage Countess Bar. She the daughter of William Dampierre II Count Flanders and Margaret II Countess Flanders (age 42). He the son of Henry of Bar II Count of Bar and Philippa Capet Countess of Bar. They were third cousins. He a great x 4 grandson of King William "Conqueror" I of England. She a great x 4 granddaughter of King William "Conqueror" I of England.

In 1246 John Hainault I Count Hainault (age 27) and Adelaide Gerulfing Countess Hainault (age 16) were married. She by marriage Countess Hainault. She the daughter of Floris Gerulfing IV Count Holland and Mathilde Reginar Countess Holland and Palatine (age 46). He the son of Bouchard Avesnes and Margaret II Countess Flanders (age 43). They were third cousins. He a great x 4 grandson of King William "Conqueror" I of England. She a great x 4 granddaughter of King William "Conqueror" I of England.

Before Jan 1250 William Jülich IV Count Jülich (age 40) and Richardis Guelders Countess Jülich (age 35) were married. She by marriage Countess Jülich. He had previously married her sister Margaret Guelders Countess Jülich; an example of Married to Two Siblings. She the daughter of Gerard III Count Guelders and Margaret Reginar Countess Guelders. He the son of William Jülich III Count Jülich and Matilda Luxemburg Countess Jülich. They were third cousins. She a great x 4 granddaughter of King William "Conqueror" I of England.

In 1265 Robert Dampierre III Count Flanders (age 16) and Blanche Capet Countess Flanders (age 15) were married. She by marriage Countess Flanders. He the son of Guy Dampierre Count Flanders (age 39) and Mathilde Bethune. They were third cousins. He a great x 5 grandson of King William "Conqueror" I of England. She a great x 2 granddaughter of King Henry "Curtmantle" II of England.

In 1271 Robert Bruce Earl Carrick (age 27) and Marjorie Carrick 3rd Countess Carrick (age 18) were married at Turnberry Castle. He by marriage Earl Carrick. She the daughter of Niall Carrick 2nd Earl Carrick and Margaret Stewart Countess Carrick. They were third cousins. He a great x 4 grandson of King Henry I "Beauclerc" England.

In 1275 Arthur Capet Duke Brittany (age 13) and Marie Limoges Duchess Brittany were married. She by marriage Duchess Brittany 1221 Dreux. He the son of John Capet II Duke Brittany (age 36) and Beatrice Plantagenet (age 32). They were third cousins. He a grandson of King Henry III of England.

In or before 1280 Richard "Red Earl" Burgh 2nd Earl Ulster (age 21) and Margaret Burgh Countess Ulster were married. She by marriage Countess Ulster. He the son of Walter Burgh 1st Earl Ulster. They were third cousins.

Before 04 Sep 1286 Roger Mowbray 1st Baron Mowbray (age 29) and Rohese Clare Baroness Mowbray (age 31) were married. She by marriage Baroness Mowbray. She the daughter of Richard de Clare 6th Earl Gloucester 5th Earl Hertford and Maud Lacy Countess Gloucester and Hertford (age 63). They were third cousins. He a great x 2 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry I "Beauclerc" England.

In 1290 Alfonso Ivrea (age 20) and Mahaut Brienne were married. She the daughter of John Brienne I Count Eu and Beatrice Saint Pol Countess Eu. They were third cousins. He a great x 3 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.

In or before 1295 Arthur Capet Duke Brittany (age 33) and Yolande Capet Duchess Brittany (age 33) were married. She by marriage Duchess Brittany 1221 Dreux. She the daughter of Robert Capet IV Count Dreux and Beatrice Montfort Countess Dreux (age 46). He the son of John Capet II Duke Brittany (age 55) and Beatrice Plantagenet. They were third cousins. He a grandson of King Henry III of England. She a great x 5 granddaughter of King Henry I "Beauclerc" England.

In 1297 John Capet III Duke Brittany (age 10) and Isabelle Valois Duchess Brittany (age 5) were married. She by marriage Duchess Brittany 1221 Dreux. She the daughter of Charles Valois I Count Valois (age 26) and Margaret Capet Countess Valois (age 24). They were third cousins. He a great grandson of King Henry III of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.

On 06 Apr 1301 John Cromwell (age 29) and Idoine Vipont (age 42) were married. They were third cousins. He a great x 5 grandson of King Henry I "Beauclerc" England. She a great x 5 granddaughter of King Henry I "Beauclerc" England.

On 14 Nov 1302 Humphrey Bohun 4th Earl Hereford 3rd Earl Essex (age 26) and Princess Elizabeth of Rhuddlan Countess Essex, Hereford and Holland (age 20) were married. She by marriage Countess Essex, Countess Hereford. Westminster Abbey [Map]. She the daughter of King Edward "Longshanks" I of England (age 63) and Eleanor of Castile Queen Consort England. He the son of Humphrey Bohun 3rd Earl Hereford 2nd Earl Essex and Maud Fiennes Countess Essex and Hereford. They were third cousins.

On 04 Feb 1316 Theobald Verdun 2nd Lord Verdun (age 37) and Elizabeth Clare Lady Verdun (age 20) were married. She by marriage Lord Verdun. She the daughter of Gilbert "Red Earl" Clare 7th Earl Gloucester 6th Earl Hertford and Joan of Acre Countess Gloucester and Hertford. They were third cousins. She a granddaughter of King Edward "Longshanks" I of England.

Before 1320 Thomas Rich Berkeley 8th and 3rd Baron Berkeley (age 24) and Margaret Mortimer Baroness Berkeley (age 15) were married. She the daughter of Roger Mortimer 1st Earl March (age 32) and Joan Geneville Baroness Mortimer 2nd Baroness Geneville (age 33). They were third cousins. He a great x 3 grandson of King John "Lackland" of England. She a great x 4 granddaughter of King John "Lackland" of England.

In 1320 Robert III Artois (age 33) and Joan Valois Countess Zeeland Holland Avesnes and Hainault (age 26) were married. She the daughter of Charles Valois I Count Valois (age 49) and Margaret Capet Countess Valois. They were third cousins. He a great grandson of King Henry III of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.

On 25 Mar 1349 John Mowbray 4th Baron Mowbray Baron Segrave (age 8) and Elizabeth Segrave 5th Baroness Segrave Baroness Mowbray (age 10) were married. She by marriage Baroness Mowbray. He by marriage Baron Segrave. She the daughter of John Segrave 4th Baron Segrave (age 33) and Margaret Plantagenet 2nd Countess Norfolk. They were third cousins. He a great x 2 grandson of King Henry III of England. She a great granddaughter of King Edward "Longshanks" I of England.

After 06 Jun 1349 Ralph Ferrers (age 20) and Joan Grey (age 47) were married. The difference in their ages was 27 years; she, unusually, being older than him. They were third cousins. He a great x 2 grandson of King Edward "Longshanks" I of England.

Around 03 Jul 1361 John Montfort V Duke Brittany (age 22) and Mary Plantagenet Duchess Brittany (age 16) were married. She the daughter of King Edward III of England (age 48) and Philippa of Hainault Queen Consort England (age 47). They were third cousins. He a great x 2 grandson of King Henry III of England.

In Dec 1362 William Jülich I Duke Jülich (age 35) and Marie Guelders Duchess Jülich were married. She by marriage Duchess Jülich. They had three children. She the daughter of Reginald "Black" II Duke Guelders and Sophia Berthout Berthout. He the son of William Jülich V Duke Jülich. They were third cousins.

On 12 Apr 1363 Thomas Ros 4th Baron Ros Helmsley (age 28) and Beatrice Stafford Countess Desmond (age 22) were married. She the daughter of Ralph Stafford 1st Earl Stafford (age 61) and Margaret Audley Countess Stafford. They were third cousins. He a great x 5 grandson of King Henry "Curtmantle" II of England. She a great x 2 granddaughter of King Edward "Longshanks" I of England.

In or before 1365 Robert Tiptoft 3rd Baron Tibetot (age 24) and Margaret Deincourt Baroness Tibetot (age 20) were married. She by marriage Baroness Tibetot. They were third cousins. He a great x 5 grandson of King Henry "Curtmantle" II of England.

In May 1366 John Montfort V Duke Brittany (age 27) and Joan Holland Duchess Brittany (age 16) were married. She by marriage Duchess Brittany 1221 Dreux. She the daughter of Thomas Holland 1st Earl Kent and Joan "Fair Maid of Kent" Princess Wales (age 37). They were third cousins. He a great x 2 grandson of King Henry III of England. She a great granddaughter of King Edward "Longshanks" I of England.

Before 25 May 1368 William Ferrers 3rd Baron Ferrers of Groby (age 35) and Margaret Percy Baroness Ferrers Groby (age 38) were married. She by marriage Baroness Ferrers of Groby. They were third cousins. He a great x 2 grandson of King Edward "Longshanks" I of England. She a great x 5 granddaughter of King Henry "Curtmantle" II of England.

Before 13 Oct 1370 Thomas Holland 2nd Earl Kent (age 20) and Alice Fitzalan Countess Kent (age 20) were married. She by marriage Countess Kent. She the daughter of Richard Fitzalan 10th Earl Arundel 8th Earl Surrey (age 64) and Eleanor Plantagenet Countess Arundel and Surrey (age 52). He the son of Thomas Holland 1st Earl Kent and Joan "Fair Maid of Kent" Princess Wales (age 42). They were third cousins. He a great grandson of King Edward "Longshanks" I of England. She a great x 2 granddaughter of King Henry III of England.

In or before 1377 Hugh Hastings 7th Baron Hastings (age 27) and Anne Despencer Baroness Hastings, Marshal and Morley (age 18) were married. They were third cousins. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

Before 1379 Thomas Clifford 6th Baron Clifford (age 16) and Elizabeth Ros Baroness Clifford were married. She the daughter of Thomas Ros 4th Baron Ros Helmsley (age 43) and Beatrice Stafford Countess Desmond (age 37). They were third cousins. He a great x 5 grandson of King John "Lackland" of England. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

In 1380 Waleran Luxemburg (age 25) and Maud Holland (age 21) were married. She the daughter of Thomas Holland 1st Earl Kent and Joan "Fair Maid of Kent" Princess Wales (age 51). He the son of Guy of Luxemburg I Count Saint Pol and Ligny and Mathilde Chatillon Countess Saint Pol. They were third cousins. He a great x 3 grandson of King Henry III of England. She a great granddaughter of King Edward "Longshanks" I of England.

On 22 Jun 1382 John Ros 5th Baron Ros Helmsley (age 13) and Mary Percy Baroness Ros Helmsley (age 15) were married. She by marriage Baroness Ros Helmsley. He the son of Thomas Ros 4th Baron Ros Helmsley (age 47) and Beatrice Stafford Countess Desmond (age 41). They were third cousins. He a great x 3 grandson of King Edward "Longshanks" I of England.

Before 1383 Richard Talbot 7th Baron Strange Blackmere 4th Baron Talbot (age 22) and Ankaret Strange 7th Baroness Strange Blackmere, Baroness Talbot (age 21) were married. They were third cousins. He a great x 2 grandson of King Edward "Longshanks" I of England. She a great x 5 granddaughter of King John "Lackland" of England.

After 03 Jan 1383 William Willoughby 5th Baron Willoughby (age 13) and Lucy Strange Baroness Willoughby Eresby were married. They were third cousins.

In Nov 1384 Henry of Bar (age 20) and Marie de Coucy Countess Soissons (age 18) were married. She the daughter of Enguerrand de Coucy 1st Earl Bedford 1st Count Soissons (age 44) and Isabella Countess Bedford and Soissons. He the son of Robert of Bar 1st Duke of Bar (age 39) and Marie Valois Duchess Bar (age 40). They were third cousins. He a great x 3 grandson of King Edward "Longshanks" I of England. She a granddaughter of King Edward III of England.

In 1385 Sigismund I King Hungary I King Germany I King Bohemia Holy Roman Emperor Luxemburg (age 16) and Mary Hungary I Queen Hungary (age 14) were married. She the daughter of Louis I King Hungary King Poland and Elizabeth Bosnia Queen Consort Hungary. He the son of Charles IV King Bohemia Holy Roman Emperor Luxemburg and Elizabeth Pomerania Holy Roman Empress Luxemburg (age 38). They were third cousins.

In 1387 William "Nithsdale" Douglas (age 23) and Princess Egidia Stewart (age 19) were married. She the daughter of King Robert II of Scotland (age 70) and Euphemia Ross Queen Consort Scotland. He the illegitmate son of Archibald "Grim" Douglas 3rd Earl Douglas (age 57). They were third cousins. She a great x 4 granddaughter of King John "Lackland" of England.

In or before 1390 Henry Trafford (age 28) and Elizabeth Radclyffe (age 9) were married. They were third cousins.

On 24 Apr 1390 Albert Habsburg IV Duke Austria (age 12) and Joanna Sophia Wittelsbach Duchess Austria (age 17) were married at Vienna. She by marriage Duchess Austria. She the daughter of Albert Wittelsbach I Duke Bavaria (age 53) and Margaret Silesia. He the son of Albert "With the Pigtail" Habsburg III Duke Austria (age 40) and Beatrix Hohenzollern Duchess Austria (age 28). They were third cousins. She a great x 5 granddaughter of King Henry "Curtmantle" II of England.

Before 01 Jun 1402 Thomas Mowbray 4th Earl Norfolk 2nd Earl Nottingham (age 16) and Constance Holland Countess Norfolk and Nottingham (age 15) were married. She by marriage Countess Norfolk, Countess Nottingham. She the daughter of John Holland 1st Duke Exeter and Elizabeth Lancaster Duchess Exeter (age 39). He the son of Thomas Mowbray 1st Duke of Norfolk and Elizabeth Fitzalan Duchess Norfolk (age 36). They were third cousins. He a great x 3 grandson of King Edward "Longshanks" I of England. She a great granddaughter of King Edward III of England.

In 1413 James "White Earl" Butler 4th Earl Ormonde (age 19) and Joan Beauchamp Countess Ormonde were married. She by marriage Countess Ormonde. He the son of James Butler 3rd Earl Ormonde and Anne Welles Countess Ormonde. They were third cousins. He a great x 3 grandson of King Edward "Longshanks" I of England. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

In 1413 Louis "Bearded" Wittelsbach VII Duke Bavaria (age 45) and Catherine Valois Duchess Bavaria (age 33) were married. She by marriage Duchess Bavaria. She the daughter of Peter Valois II Count Alençon and Marie Chamaillart Countess Alençon. He the son of Stephen "Magnificient Fop" Wittelsbach III Duke Bavaria (age 76) and Taddea Visconti Duchess Bavaria. They were third cousins.

Before 1414 Hugh Courtenay 12th Earl Devon (age 25) and Anne Talbot Countess Devon (age 20) were married. He the son of Edward "Blind Earl" Courtenay 11th Earl Devon (age 56) and Maud Camoys Countess Devon. They were third cousins. He a great x 3 grandson of King Edward "Longshanks" I of England. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

Before 06 Sep 1415 Piers Mauley 5th Baron de Mauley (age 38) and Maud Neville Baroness Haversham (age 32) were married. She by marriage Baroness Haversham. She the daughter of Ralph Neville 1st Earl of Westmoreland (age 51) and Margaret Stafford Baroness Neville Raby. They were third cousins. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

In 1418 John Grey 1st Earl Tankerville (age 33) and Joan Charleton Countess Tankerville (age 18) were married. She by marriage Countess Tankerville. She the daughter of Edward Charleton 5th Baron Cherleton (age 48) and Eleanor Holland Countess March and Ulster. They were third cousins. He a great x 3 grandson of King Edward "Longshanks" I of England. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

Around 1420 Thomas Courtenay 13th Earl Devon (age 6) and Margaret Beaufort Countess Devon (age 11) were married. She the daughter of John Beaufort 1st Marquess Somerset and Dorset and Margaret Holland Duchess Clarence (age 35). He the son of Hugh Courtenay 12th Earl Devon (age 31) and Anne Talbot Countess Devon (age 27). They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great granddaughter of King Edward III of England.

On 24 Oct 1420 René Valois Anjou I Duke Anjou (age 11) and Isabella Metz Duchess Anjou I Duchess Lorraine (age 20) were married. She the daughter of Charles Metz II Duke Lorraine (age 56). He the son of King Louis of Naples and Yolanda Barcelona Queen Consort Naples. They were third cousins. He a great x 5 grandson of King Henry III of England.

Before 23 Mar 1421 John Ros 7th Baron Ros Helmsley (age 24) and Margery Despencer 3rd Baroness Despencer, Baroness Ros (age 24) were married. She by marriage Baroness Ros Helmsley. They were third cousins. He a great x 4 grandson of King Henry III of England.

Around 1423 Humphrey Lancaster 1st Duke Gloucester (age 32) and Jacqueline Wittelsbach Duchess Brabant and Gloucester (age 21) were married. The marriage was annulled in 1428. She the daughter of William Wittelsbach IV Count Holland VI Count Hainault V Count Zeeland and Margaret Valois Countess Holland (age 48). He the son of King Henry IV of England and Mary Bohun. They were third cousins. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

On 13 May 1423 John Lancaster 1st Duke Bedford (age 33) and Anne Valois Duchess of Bedford (age 18) were married at Troyes, France [Map]. She by marriage Duchess Bedford She the daughter of John "Fearless" Valois Duke Burgundy and Margaret Wittelsbach Duchess Burgundy. He the son of King Henry IV of England and Mary Bohun. They were third cousins. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

After Mar 1424 Thomas Clifford 8th Baron Clifford (age 9) and Joan Dacre Baroness Clifford were married. She by marriage Baroness de Clifford. He the son of John Clifford 7th Baron Clifford and Elizabeth Percy Countess of Westmoreland (age 29). They were third cousins. He a great x 3 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward "Longshanks" I of England.

Before 1425 Richard Beauchamp 13th Earl Warwick (age 42) and Isabel Despencer Countess Warwick and Worcester (age 24) were married. She by marriage Countess Warwick. She the daughter of Thomas Despencer 1st Earl Gloucester and Constance York Countess Gloucester. He the son of Thomas Beauchamp 12th Earl Warwick and Margaret Ferrers Countess Warwick. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great granddaughter of King Edward III of England.

Around 1426 Philip Courtenay (age 21) and Elizabeth Hungerford were married. They were third cousins. He a great x 3 grandson of King Edward "Longshanks" I of England.

In 1428 John Stanley (age 5) and Cecilia Arderne (age 5) were married. They were third cousins.

On 07 Jan 1430 Philip "Good" Valois III Duke Burgundy (age 33) and Isabella Aviz Duchess Burgundy (age 32) were married. She by marriage Duchess Burgundy. She the daughter of King John I of Portugal (age 78) and Philippa Lancaster Queen Consort Portugal. He the son of John "Fearless" Valois Duke Burgundy and Margaret Wittelsbach Duchess Burgundy. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great granddaughter of King Edward III of England.

On 01 Oct 1430 Guy 14th de Laval Count (age 24) and Isabella Montfort (age 19) were married. They were third cousins. He a great x 4 grandson of King Henry III of England. She a great x 4 granddaughter of King Henry III of England.

In 1434 Henry Beauchamp 1st Duke Warwick (age 8) and Cecily Neville Duchess Warwick (age 10) were married at Titchfield Abbey, Hampshire [Map]. A Marriage of Two Sets of Siblings. His sister Anne Beauchamp 16th Countess Warwick (age 7) would marry her brother Richard "Kingmaker" Neville Earl Warwick, 6th Earl Salisbury (age 5) two years later. She the daughter of Richard Neville Earl Salisbury (age 34) and Alice Montagu 5th Countess of Salisbury (age 27). He the son of Richard Beauchamp 13th Earl Warwick (age 51) and Isabel Despencer Countess Warwick and Worcester (age 33). They were third cousins. He a great x 2 grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.

Before 1436 William Hay 1st Earl Erroll (age 13) and Beatrice Douglas Countess Erroll were married. She the daughter of James "Gross" Douglas 7th Earl Douglas 1st Earl Avondale (age 64) and Beatrix Sinclair Countess Douglas and Avondale (age 37). They were third cousins.

In 1436 Richard "Kingmaker" Neville Earl Warwick, 6th Earl Salisbury (age 7) and Anne Beauchamp 16th Countess Warwick (age 9) were married. A Marriage of Two Sets of Siblings. His sister Cecily Neville Duchess Warwick (age 12) had previously married her brother Henry Beauchamp 1st Duke Warwick (age 10). She the daughter of Richard Beauchamp 13th Earl Warwick (age 53) and Isabel Despencer Countess Warwick and Worcester (age 35). He the son of Richard Neville Earl Salisbury (age 36) and Alice Montagu 5th Countess of Salisbury (age 29). They were third cousins. He a great x 2 grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.

Before 05 Nov 1436 Henry Grey 2nd Earl Tankerville (age 18) and Antigone Lancaster Countess Tankerville (age 14) were married. She by marriage Countess Tankerville. She the illegitmate daughter of Humphrey Lancaster 1st Duke Gloucester (age 46). He the son of John Grey 1st Earl Tankerville and Joan Charleton Countess Tankerville. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a granddaughter of Henry IV King England.

Before 27 Aug 1439 John Grey (age 52) and Margaret Mowbray Baroness Grey Ruthyn (age 51) were married. She by marriage Baroness Grey of Ruthyn. She the daughter of Thomas Mowbray 1st Duke of Norfolk and Elizabeth Fitzalan Duchess Norfolk. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

On 30 Sep 1439 Charles "Viana" IV King Navarre (age 18) and Agnes La Marck Queen Consort Navarre were married at Olite. She the daughter of Adolph La Marck I Duke Cleves (age 66) and Marie Valois Duchess Cleves (age 46). He the son of John II King Aragon (age 41) and Blanche Évreux Queen Consort Aragon (age 51). They were third cousins. She a great x 5 granddaughter of King Edward "Longshanks" I of England.

On 19 May 1440 Charles "Bold" Valois Duke Burgundy (age 6) and Catherine Valois (age 11) were married. She the daughter of Charles "Victorious" VII King France (age 37) and Marie Valois Anjou Queen Consort France (age 35). He the son of Philip "Good" Valois III Duke Burgundy (age 43) and Isabella Aviz Duchess Burgundy (age 43). They were third cousins. He a great x 2 grandson of King Edward III of England.

Around 1441 Robert Hungerford 3rd Baron Hungerford 1st Baron Moleyns (age 10) and Eleanor Moleyns Baroness Hungerford (age 14) were married. They were third cousins.

Before 29 Sep 1442 John Howard 1st Duke of Norfolk (age 17) and Katherine Moleyns (age 18) were married. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 5 granddaughter of King Henry III of England.

After 27 Jan 1443 Christopher Talbot (age 24) and Joyce Charleton Baroness Tiptoft (age 39) were married. She the daughter of Edward Charleton 5th Baron Cherleton and Eleanor Holland Countess March and Ulster. He the son of John "Old Talbot" Talbot 1st Earl of Shrewsbury (age 60) and Maud Neville 6th Baroness Furnivall. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

In 1444 John Valois Anjou II Duke Lorraine (age 19) and Marie Bourbon Duchess Anjou (age 16) were married. She by marriage Duchess Anjou. She the daughter of Charles Bourbon I Duke Bourbon (age 43) and Agnes Valois Duchess Bourbon (age 39). He the son of René Valois Anjou I Duke Anjou (age 34) and Isabella Metz Duchess Anjou I Duchess Lorraine (age 44). They were third cousins. She a great x 5 granddaughter of King Edward "Longshanks" I of England.

Before 27 Oct 1444 John Radclyffe Baron Fitzwalter (age 18) and Elizabeth Fitzwalter Baroness Dinham 8th Baroness Fitzwalter (age 14) were married. He by marriage Baron Fitzwalter. They were third cousins.

Before 1445 John Talbot 2nd Earl of Shrewsbury (age 27) and Elizabeth Butler Countess Shrewsbury and Waterford (age 20) were married. She the daughter of James "White Earl" Butler 4th Earl Ormonde (age 51) and Joan Beauchamp Countess Ormonde. He the son of John "Old Talbot" Talbot 1st Earl of Shrewsbury (age 61) and Maud Neville 6th Baroness Furnivall. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

In 1447 John Scrope 5th Baron Scrope of Bolton (age 9) and Joan Fitzhugh Baroness Scrope Bolton were married. They were third cousins.

In 1447 John Bourbon II Duke Bourbon (age 21) and Joan Valois Duchess Bourbon (age 11) were married. She by marriage Duchess Bourbon. She the daughter of Charles "Victorious" VII King France (age 43) and Marie Valois Anjou Queen Consort France (age 42). He the son of Charles Bourbon I Duke Bourbon (age 46) and Agnes Valois Duchess Bourbon (age 42). They were third cousins. He a great x 5 grandson of King Edward "Longshanks" I of England.

Before 1450 William Fitzalan 16th Earl Arundel (age 32) and Joan Neville Countess Arundel (age 26) were married. She by marriage Countess Arundel Sussex. She the daughter of Richard Neville Earl Salisbury (age 49) and Alice Montagu 5th Countess of Salisbury (age 42). He the son of John Fitzalan 13th Earl Arundel and Eleanor Berkeley Countess Arundel (age 67). They were third cousins. He a great x 5 grandson of King Henry III of England. She a great x 2 granddaughter of King Edward III of England.

In 1451 Thomas Stanley 1st Earl of Derby (age 16) and Eleanor Neville Baroness Stanley (age 4) were married in the Chapel at Middleham Castle [Map]. She the daughter of Richard Neville Earl Salisbury (age 51) and Alice Montagu 5th Countess of Salisbury (age 44). They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 2 granddaughter of King Edward III of England.

Before 1455 Thomas Ros 9th Baron Ros Helmsley (age 27) and Philippa Tiptoft Baroness Ros Helmsley (age 31) were married. She by marriage Baroness Ros Helmsley. He the son of Thomas Ros 8th Baron Ros Helmsley and Eleanor Beauchamp Duchess Somerset (age 46). They were third cousins. He a great x 5 grandson of King Henry III of England. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

Before 1461 James Luttrell (age 34) and Elizabeth Courtenay Baroness Dunster (age 30) were married. She by marriage Baroness Mohun of Dunster. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

Before 02 Feb 1461 John Courtenay 15th Earl Devon (age 26) and Laura Bourchier Countess Devon (age 21) were married. She the daughter of Henry Bourchier 2nd Count Eu 1st Earl Essex (age 57) and Isabel York Countess Eu and Essex (age 52). He the son of Thomas Courtenay 13th Earl Devon and Margaret Beaufort Countess Devon. They were third cousins. He a great x 2 grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.

In 1462 Jacques Armagnac Duke Nemours (age 29) and Louise Valois Anjou Duchess Nemours (age 17) were married. She the daughter of Charles Valois Anjou Count Maine (age 48) and Isabelle Luxemburg Countess Maine. They were third cousins.

In 1463 Henry Neville (age 26) and Joan Bourchier (age 21) were married. He was buried in the Beauchamp Chapel, St Mary's Church, Warwick [Map]. They were third cousins. He a great x 2 grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.

After 25 Apr 1464 Thomas Wingfield and Philippa Tiptoft Baroness Ros Helmsley (age 41) were married. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

In 1466 William Berkeley 1st Marquess Berkeley (age 40) and Elizabeth West 3rd Baroness Berkeley were married. She by marriage Baroness Berkeley. They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 5 granddaughter of King Henry III of England.

Before 1467 John Hay 1st Lord Hay of Yester (age 41) and Mary Lindsay were married. They were third cousins.

Around 12 Jun 1472 Thomas Stanley 1st Earl of Derby (age 37) and Margaret Beaufort Countess Richmond (age 29) were married. She by marriage Queen Mann, Baroness Stanley. She the daughter of John Beaufort 1st Duke Somerset and Margaret Beauchamp Duchess Somerset (age 62). They were third cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great x 2 granddaughter of King Edward III of England.

In 1484 Jean III King Navarre (age 15) and Catherine Grailly I Queen Navarre (age 16) were married. He by marriage King Navarre. She the daughter of Gaston V Count Foix and Magdalena Valois Countess Foix (age 40). They were third cousins.

In Dec 1489 Edward Stafford 3rd Duke of Buckingham (age 11) and Eleanor Percy Duchess Buckingham were married. She by marriage Duchess of Buckingham. The executors of her father Henry Percy 4th Earl of Northumberland, who had been hanged by rebels during the Northern Rebellion earlier in the year, having paid King Henry VII of England and Ireland (age 32) £4000 for the privilege. His father, Henry Stafford 2nd Duke of Buckingham, had been hanged for treason in 1483. She the daughter of Henry Percy 4th Earl of Northumberland and Maud Herbert Countess Northumberland. He the son of Henry Stafford 2nd Duke of Buckingham and Catherine Woodville Duchess Buckingham Duchess Bedford (age 31). They were third cousins. He a great x 4 grandson of King Edward III of England. She a great x 4 granddaughter of King Edward III of England.

Before 11 Oct 1492 Charles VIII King France (age 22) and Anne of Brittany Queen Consort France (age 15) were married. She by marriage Queen Consort of France. He the son of Louis "Father of the People" XI King France and Charlotte Savoy Queen Consort France. They were third cousins. She a great x 5 granddaughter of King Henry III of England.

In 1494 Maximilian Habsburg I Holy Roman Emperor (age 34) and Bianca Maria Sforza Holy Roman Empress (age 22) were married. She by marriage Holy Roman Empress. He the son of Frederick "Peaceful or Fat" Habsburg III Holy Roman Emperor and Eleanor Aviz Holy Roman Empress. They were third cousins. He a great x 3 grandson of King Edward III of England.

After 1494 Humphrey Vernon (age 18) and Alice Ludlow (age 12) were married. They were third cousins. She a great x 3 granddaughter of Henry IV King England.

Around 1497 William Pole (age 19) and Katherine Stourton Baroness Grey Codnor (age 42) were married. The difference in their ages was 23 years; she, unusually, being older than him. He the son of John de la Pole 2nd Duke of Suffolk and Elizabeth York Duchess Suffolk (age 52). They were third cousins. He a great x 3 grandson of King Edward III of England.

Before 1504 John Grey 2nd Viscount Lisle (age 23) and Muriel Howard Viscountess Lisle (age 18) were married. She by marriage Viscountess Lisle. She the daughter of Thomas Howard 2nd Duke of Norfolk (age 60) and Elizabeth Tilney Countess of Surrey. They were third cousins.

Around 1504 Philip Calthorpe (age 40) and Mary Saye (age 39) were married. They were third cousins.

Before 1506 William Brereton (age 33) and Alice Savage (age 33) were married. They were third cousins.

Before 11 Jun 1507 George Seton 4th Lord Seton (age 76) and Margaret Campbell Lady Seton were married. She by marriage Lord Seton. The difference in their ages was 37 years. She the daughter of Colin Campbell 1st Earl Argyll and Isabella Stewart Countess Argyll. They were third cousins.

Around Dec 1509 George Hastings 1st Earl Huntingdon (age 22) and Anne Stafford Countess Huntingdon (age 26) were married. She by marriage Baroness Hastings. She the daughter of Henry Stafford 2nd Duke of Buckingham and Catherine Woodville Duchess Buckingham Duchess Bedford. They were third cousins. He a great x 4 grandson of King Edward III of England. She a great x 4 granddaughter of King Edward III of England.

In May 1510 Henry Pole 1st Baron Montagu (age 18) and Jane Neville Baroness Montagu (age 29) were married. She by marriage Baroness Montagu. They were third cousins. He a great x 4 grandson of King Edward III of England. She a great x 4 granddaughter of King Edward III of England.

Before 10 Sep 1510 Henry Ughtred 6th Baron Ughtred and Agnes Constable Baroness Ughtred were married. She by marriage Baroness Ughtred. They were third cousins. She a great x 4 granddaughter of King Edward III of England.

After 27 Jul 1511 Alexander Gordon 3rd Earl Huntley and Elizabeth Gray Countess Huntley and Rothes (age 46) were married. She by marriage Countess Huntley. He the son of George Gordon 2nd Earl Huntley. They were third cousins.

Before 1513 William Stourton 5th Baron Stourton (age 56) and Catherine Pole (age 35) were married. The difference in their ages was 20 years. She the daughter of John de la Pole 2nd Duke of Suffolk and Elizabeth York Duchess Suffolk. They were third cousins. She a great x 3 granddaughter of King Edward III of England.

In 1515 Christian II King Denmark II King Norway (age 33) and Isabella of Austria Queen Consort Denmark and Norway (age 13) were married. She by marriage Queen Consort Denmark, Queen Consort Norway. The difference in their ages was 20 years. She the daughter of Philip "Handsome Fair" King Castile and Joanna "The Mad" Trastámara Queen Castile (age 36). He the son of John King Denmark Norway and Sweden and Christina Queen Consort Denmark Norway and Sweden (age 53). They were third cousins. She a great x 4 granddaughter of King Edward III of England.

After Nov 1517 William Gascoigne (age 50) and Margaret Neville (age 23) were married. The difference in their ages was 27 years. They were third cousins. He a great x 4 grandson of King Edward III of England. She a great x 4 granddaughter of King Edward III of England.

On 11 Dec 1523 Landgrave Philip I of Hesse (age 19) and Christine of Saxony (age 17) were married. He the son of William II Landgrave of Hesse. They were third cousins.

Before 1526 Edmund Trafford (age 18) and Anne Radclyffe (age 15) were married. They were third cousins.

In 1526 Thomas Berkeley 6th Baron Berkeley (age 21) and Mary Hastings (age 12) were married. She the daughter of George Hastings 1st Earl Huntingdon (age 39) and Anne Stafford Countess Huntingdon (age 43). They were third cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

In or before 1528 Thomas Percy (age 24) and Eleanor Harbottle (age 23) were married. He the son of Henry Percy 5th Earl of Northumberland and Katherine Spencer Countess Northumberland (age 50). They were third cousins. He a great x 4 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

In or before 1529 Christopher Barnewell of Crickstown (age 29) and Catherine Fleming were married. They were third cousins.

In or before 1530 Edward Stanley 3rd Earl of Derby (age 20) and Katherine Howard Countess Derby were married without the King's permission. She the daughter of Thomas Howard 3rd Duke of Norfolk (age 56) and Elizabeth Stafford Duchess Norfolk (age 32). He the son of Thomas Stanley 2nd Earl of Derby and Anne Hastings Countess Derby (age 44). They were third cousins. He a great x 5 grandson of King Edward III of England.

Before 1535 Richard Grosvenor (age 55) and Catherine Cotton (age 44) were married. They were third cousins.

On 18 Jun 1538 King James V of Scotland (age 26) and Mary of Guise Queen Consort Scotland (age 22) were married at St Andrew's Cathedral Priory, St Andrew's. She by marriage Queen Consort Scotland. She the daughter of Claude Lorraine 1st Duke Guise (age 41) and Antoinette Bourbon Duchess of Guise (age 45). He the son of King James IV of Scotland and Margaret Tudor Queen Scotland (age 48). They were third cousins. He a grandson of King Henry VII of England and Ireland.

After 03 Dec 1542 John Plunkett 4th Baron Killeen (age 32) and Ellen Barnewall Baroness Killeen (age 29) were married. She by marriage Baroness Killeen. They were third cousins.

Before 1543 Francis Lorraine I Duke Lorraine (age 25) and Christina Oldenburg Duchess Lorraine (age 21) were married. She the daughter of Christian II King Denmark II King Norway (age 61) and Isabella of Austria Queen Consort Denmark and Norway. He the son of Antoine Lorraine II Duke Lorraine (age 53) and Renée Bourbon Duchess Lorraine. They were third cousins. She a great x 5 granddaughter of King Edward III of England.

Around Jun 1547 William Sinclair 5th Lord Sinclair (age 20) and Janet Lindsay were married. They were third cousins. She a great x 5 granddaughter of King Edward III of England.

In 1549 John Stewart 4th Earl Atholl and Margaret Fleming Countess Atholl (age 20) were married. She by marriage Countess Atholl. He the son of John Stewart 3rd Earl Atholl and Grizzell Ratray Countess Atholl. They were third cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

Before 02 Apr 1550 Brian Stapleton (age 73) and Elizabeth Scrope were married. They were third cousins. He a great x 4 grandson of King Edward III of England. She a great x 4 granddaughter of King Edward III of England.

In or before 1553 Matthew Campbell of Loudon (age 22) and Isabel Drummond of Innerpaffrey (age 19) were married. They were third cousins.

In 1553 Archibald Campbell 5th Earl Argyll (age 19) and Jean Stewart Countess Argyll (age 20) were married. She by marriage Countess Argyll. She the illegitmate daughter of King James V of Scotland and Elizabeth Bethune. He the son of Archibald Campbell 4th Earl Argyll (age 46) and Helen Hamilton Countess Argyll. They were third cousins. She a great granddaughter of King Henry VII of England and Ireland.

Before 10 Dec 1553 Anthony Browne 1st Viscount Montagu (age 25) and Magdalen Dacre Viscountess Montague (age 15) were married. They were third cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

In 1554 Hugh Montgomerie 3rd Earl Eglinton (age 23) and Jean Hamilton Countess Eglinton were married. She by marriage Countess Eglinton. She the daughter of James Hamilton 2nd Earl Arran (age 38) and Margaret Douglas Duchess Châtellerault. He the son of Hugh Montgomerie 2nd Earl Eglinton and Marion Seton Countess Eglinton (age 59). They were third cousins.

On 28 May 1554 Gerald "Wizard Earl" Fitzgerald 11th Earl of Kildare (age 29) and Mabel Browne Countess Kildare (age 18) were married at the Chapel Royal, St James's Palace. She by marriage Countess Kildare. He the son of Gerald Fitzgerald 9th Earl of Kildare and Elizabeth Grey Countess Kildare. They were third cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

After 1558 Henry Scrope 9th Baron Scrope of Bolton (age 24) and Margaret Howard Baroness Scrope Bolton (age 14) were married. She by marriage Baroness Scrope of Bolton. They were third cousins.

On 22 Jun 1558 Thomas Percy 7th Earl of Northumberland (age 30) and Anne Somerset Countess Northumberland (age 20) were married. She by marriage Countess of Northumberland. She the daughter of Henry Somerset 2nd Earl of Worcester and Elizabeth Browne Countess of Worcester (age 56). They were third cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

Before 1561 William Hay 5th Lord Hay (age 23) and Margaret Kerr (age 21) were married. They were third cousins.

In Feb 1566 James "Lord Bothwell" Hepburn 1st Duke Orkney (age 32) and Jean Gordon Countess Bothwell and Sutherland (age 20) were married. She by marriage Countess Bothwell. She the daughter of George Gordon 4th Earl Huntley. He the son of Patrick Hepburn 3rd Earl Bothwell and Agnes Sinclair Countess Bothwell. They were third cousins. He a great x 5 grandson of King Edward III of England.

On 07 May 1567 James "Lord Bothwell" Hepburn 1st Duke Orkney (age 33) and Jean Gordon Countess Bothwell and Sutherland (age 21) were divorced.

In or before 1568 Thomas Wentworth (age 46) and Margaret Gascoigne (age 18) were married. The difference in their ages was 27 years. They were third cousins.

In 1570 Archibald Stewart 11th of Castlemilk and Janet Stewart were married. They were third cousins.

After 1572 Arthur Grey 14th Baron Grey of Wilton (age 36) and Jane Sibella Morrison Baroness Grey Wilton (age 22) were married. She by marriage Baroness Grey of Wilton. She the daughter of Richard Morrison (age 59) and Bridget Hussey Countess Bedford (age 46). They were third cousins. He a great x 5 grandson of King Edward III of England.

On 27 Sep 1574 Philipp Ludwig Count Palatine of Neuburg (age 26) and Anna of Cleves (age 22) were married. She the daughter of William La Marck Duke of Jülich Cleves Berg (age 58) and Maria Habsburg Spain Duchess Cleves (age 43). They were third cousins.

Around 1575 Henry Cholmley (age 19) and Margaret Babthorpe (age 17) were married. They were third cousins.

In 1577 George Clifford 3rd Earl of Cumberland (age 18) and Margaret Russell Countess Cumberland (age 16) were married. She being the daughter of Francis Russell 2nd Earl Bedford (age 50) who had been given George's wardship by Queen Elizabeth I of England and Ireland (age 43). She by marriage Countess of Cumberland. She the daughter of Francis Russell 2nd Earl Bedford (age 50) and Margaret St John Countess Bedford. He the son of Henry Clifford 2nd Earl of Cumberland and Anne Dacre Countess Cumberland (age 56). They were third cousins.

On 23 Jan 1581 James "The Bonnie Earl" Stewart 2nd Earl Moray (age 16) and Elizabeth Stewart 2nd Countess Moray (age 15) were married. She by marriage Lord Doune. He by marriage 2nd Earl Moray. She the daughter of James Stewart 1st Earl Moray Regent and Agnes Keith Countess Moray and Argyll (age 50). They were third cousins. She a great x 2 granddaughter of King Henry VII of England and Ireland.

Before 1582 Thomas Howard 1st Earl Suffolk (age 20) and Catherine Knyvet Countess Suffolk (age 17) were married. She by marriage Baroness Audley Walden in Essex. He the son of Thomas Howard 4th Duke of Norfolk and Margaret Audley Duchess Norfolk. They were third cousins.

In 1584 Thomas Scrope 10th Baron Scrope of Bolton (age 17) and Philadelphia Carey Baroness Scrope Bolton were married. They were third cousins.

Before 26 Sep 1586 Christopher Plunkett 8th Baron Killeen (age 22) and Genet Dillon Baroness Killeen were married. They were third cousins.

Before Jun 1590 Ludovic Stewart 2nd Duke Lennox 1st Duke Richmond (age 15) and Sophia Ruthven Duchess Lennox were married. She by marriage Duchess Lennox. She the daughter of William Ruthven 1st Earl Gowrie and Dorothea Stewart Countess Gowrie. He the son of Esme Stewart 1st Duke Lennox and Catherine Balsac Duchess Lennox. They were third cousins.

Before 25 Feb 1591 William Brereton 1st Baron Brereton (age 41) and Margaret Savage (age 42) were married. They were third cousins.

On 24 Jul 1592 Archibald Campbell 7th Earl Argyll (age 17) and Agnes Douglas Countess Argyll (age 18) were married. She the daughter of William Douglas 6th Earl Morton (age 52) and Agnes Leslie Countess Morton (age 50). He the son of Colin Campbell 6th Earl Argyll and Agnes Keith Countess Moray and Argyll. They were third cousins.

In 1593 Robert Catesby (age 20) and Catherine Leigh (age 20) were married. They were third cousins.

Before Oct 1593 David Barry 5th Viscount Buttevant (age 43) and Ellen Roche Viscountess Buttivant were married. She by marriage Viscountess Buttevant. They were third cousins.

Before 1594 Thomas Egerton (age 17) and Isabella Venables (age 17) were married. They were third cousins.

On 07 Feb 1597 William Howard 3rd Baron Howard of Effingham (age 19) and Anne St John Lady Effingham (age 22) were married. He the son of Charles Howard 1st Earl Nottingham (age 61) and Katherine Carey Countess Nottingham (age 47). They were third cousins.

On 04 Nov 1597 John Kennedy 5th Earl Cassilis (age 22) and Jean Fleming Countess Cassilis (age 43) were married. She by marriage Countess Cassilis. The difference in their ages was 21 years; she, unusually, being older than him. He the son of Gilbert Kennedy 4th Earl Cassilis and Margaret Lyon Marchioness Hamilton. They were third cousins.

On 23 Jul 1605 Edward Vernon (age 25) and Margaret Vernon (age 13) were married. They were third cousins.

On 26 Dec 1605 Charles Blount 1st Earl Devonshire (age 42) and Penelope Devereux Countess Devonshire (age 42) were married at Wansted House during a service conducted by Archbishop William Laud (age 32) (future). The marriage was regarded as uncanonical and resulted in the disgrace of both parties, who were banished from King James I's court circles. She by marriage Countess Devonshire. She the daughter of Walter Devereux 1st Earl Essex and Lettice Knollys Countess Essex (age 62). They were third cousins.

On 24 Apr 1606 Henry Lorraine II Duke Lorraine (age 43) and Margherita Gonzaga Duchess Lorraine (age 14) were married. The difference in their ages was 28 years. He the son of Charles "The Great" Lorraine III Duke Lorraine (age 63) and Claude Valois Duchess Lorraine. They were third cousins.

Before 13 Dec 1606 Brian Stapleton (age 64) and Eleanor Neville (age 89) were married. The difference in their ages was 25 years; she, unusually, being older than him. She the daughter of Ralph Neville 4th Earl of Westmoreland and Katherine Stafford Countess of Westmoreland. They were third cousins.

Before 1607 Thomas Howard 21st Earl Arundel 4th Earl Surrey 1st Earl Norfolk (age 21) and Alethea Talbot Countess Arundel, Surrey and Norfolk (age 21) were married. She by marriage Countess Arundel Sussex, Countess Surrey. She the daughter of Gilbert Talbot 7th Earl of Shrewsbury (age 54) and Mary Cavendish Countess Shrewsbury and Waterford (age 50). He the son of Philip Howard 20th Earl Arundel and Anne Dacre Countess Arundel (age 49). They were third cousins.

On 19 Feb 1608 Francesco IV Gonzaga Duke of Mantua (age 21) and Margaret of Savoy Vicereine Portugal (age 18) were married. She the daughter of Charles Emmanuel Savoy I Duke Savoy (age 46) and Catherine Habsburg Spain Duchess Savoy. They were third cousins.

Before 1609 John Vavasour (age 71) and Eleanor Fairfax (age 70) were married. They were third cousins.

On 04 May 1611 Alexander Livingston 2nd Earl Linlithgow and Elizabeth Gordon (age 15) were married. She the daughter of George Gordon 1st Marquess Huntly (age 49) and Henrietta Stewart Marchioness Huntly (age 38). He the son of Alexander Livingston 1st Earl Linlithgow and Helen Hay. They were third cousins.

Before 1616 Edward Seymour (age 30) and Anne Sackville were married. She the daughter of Robert Sackville 2nd Earl Dorset and Margaret Howard. They were third cousins. He a great x 3 grandson of King Henry VII of England and Ireland.

In 1619 Victor Amadeus I Duke of Savoy (age 31) and Christine Marie Bourbon Duchess Savoy (age 12) were married. She the daughter of Henry IV King France and Marie de Medici Queen Consort France (age 43). He the son of Charles Emmanuel Savoy I Duke Savoy (age 56) and Catherine Habsburg Spain Duchess Savoy. They were third cousins.

Before 1623 Thomas Tempest (age 29) and Eleanor Tempest were married. They were third cousins.

On 25 Mar 1623 Anthony Irby (age 18) and Frances Wray (age 12) were married. They were third cousins.

On 05 Apr 1624 John Hay 1st Earl Tweeddale (age 31) and Jean Seton Countess Tweeddale (age 18) were married. She by marriage Lord Hay of Yester. She the daughter of Alexander Seton 1st Earl Dunfermline and Grizel Leslie Countess Dunfermline. They were third cousins.

Around 1626 John Darcy 3rd Baron Darcy Aston (age 54) and Elizabeth West Baroness Darcy (age 45) were married. She by marriage Baroness Darcy of Aston. They were third cousins.

Before 1630 Nicholas Preston 6th Viscount Gormanston (age 22) and Mary Barnewall (age 11) were married. He the son of Jenico Preston 5th Viscount Gormanston (age 45) and Margaret St Lawrence Countess Fingall. They were third cousins.

Before 01 Feb 1634 John Fleming 3rd Earl Wigtown and Jean Drummond Countess Wigtown were married. She the daughter of John Drummond 2nd Earl Perth (age 46) and Jean Ker Countess Perth. He the son of John Fleming 2nd Earl Wigtown (age 45) and Margaret Livingston Countess Wigtown. They were third cousins.

In 1637 William Keith 7th Earl Marischal and Elizabeth Seton Countess Marischal (age 16) were married. She by marriage Countess Marischal. She the daughter of George Seton 3rd Earl Winton (age 52) and Anne Hay Countess Winton. He the son of William Keith 6th Earl Marischal and Mary Erskine. They were third cousins.

Around 1650 Heneage Finch 3rd Earl Winchilsea (age 22) and Mary Seymour Countess Winchelsea (age 13) were married. She by marriage Countess Winchilsea. She the daughter of William Seymour 2nd Duke Somerset (age 62) and Frances Devereux Duchess of Somerset (age 50). He the son of Thomas Finch 2nd Earl Winchilsea and Cecily Wentworth Countess Winchelsea. They were third cousins. She a great x 4 granddaughter of King Henry VII of England and Ireland.

In or before 1655 Patrick Chaworth 3rd Viscount Chaworth (age 19) and Grace Manners Viscountess Chaworth were married. She by marriage Viscountess Chaworth in County Armagh. She the daughter of John Manners 8th Earl of Rutland (age 50) and Frances Montagu Countess Rutland (age 40). They were third cousins.

On 29 Apr 1656 William Hamilton Duke Hamilton (age 21) and Anne Hamilton 3rd Duchess Hamilton (age 24) were married. She by marriage Countess Selkirk. He by marriage Duke Hamilton. She the daughter of James Hamilton 1st Duke Hamilton and Mary Feilding Duchess Hamilton. He the son of William Douglas 1st Marquess Douglas (age 67) and Mary Gordon Marchioness Douglas (age 56). They were third cousins.

Before 06 Nov 1656 Robert Harley (age 77) and Mary Newport were married. They were third cousins.

On 11 Apr 1664 Nicholas Tufton 3rd Earl of Thanet (age 32) and Elizabeth Boyle Countess Isle Thanet were married. She by marriage Countess of Thanet. She the daughter of Richard Boyle 2nd Earl Cork 1st Earl Burlington (age 51) and Elizabeth Clifford Countess Burlington (age 50). He the son of John Tufton 2nd Earl of Thanet (age 55) and Margaret Sackville Countess Isle Thanet (age 49). They were third cousins.

In 1672 George Savile 1st Marquess Halifax (age 38) and Gertrude Pierrepont Marchioness Halifax were married. She by marriage Lady Savile of Thornhill. They were third cousins.

In Oct 1676 George Gordon 1st Duke Gordon (age 33) and Elizabeth Howard Duchess Gordon were married. She by marriage Marchioness Huntly. She the daughter of Henry Howard 6th Duke of Norfolk (age 48) and Jane Bickerton Duchess Norfolk (age 33). He the son of Lewis Gordon 3rd Marquess Huntly. They were third cousins.

On 05 Oct 1676 James Drummond 1st Duke Perth (age 28) and Lilias Drummond Countess Tullibardine and Perth were married. He the son of James Drummond 3rd Earl Perth and Anne Gordon. They were third cousins.

On 06 Feb 1677 Edward Lee 1st Earl Lichfield (age 14) and Charlotte Fitzroy Countess Lichfield (age 12) were married. She by marriage Countess Lichfield. She the illegitmate daughter of King Charles II of England Scotland and Ireland (age 46) and Barbara Villiers 1st Duchess of Cleveland (age 36). He the son of Francis Lee 4th Baronet and Elizabeth Pope Countess Lindsey. They were third cousins.

On 10 Jul 1679 Charles Paulet 2nd Duke Bolton (age 18) and Margaret Coventry (age 22) were married. He the son of Charles Paulet 1st Duke Bolton (age 49) and Mary Scrope 6th Marchioness Winchester. They were third cousins.

On 07 Mar 1680 Louis "Le Grand Dauphin" Bourbon Duke Burgundy (age 18) and Maria Anna Victoria Wittelsbach Duchess Burgundy (age 19) were married. She by marriage Duchess Burgundy. He the son of Louis "Sun King" XIV King France (age 41) and Maria Theresa of Spain Queen Consort France (age 41). They were third cousins.

Before 1681 Alexander Home 7th Earl of Home and Anne Kerr Countess Home were married. She the daughter of William Kerr 2nd Marquess Lothian (age 19). He the son of Charles Home 6th Earl of Home. They were third cousins.

Around 06 Jul 1682 James Seton 4th Earl Dunfermline (age 39) and Jean Gordon Countess Dunfermline were married. She by marriage Countess Dunfermline. She the daughter of Lewis Gordon 3rd Marquess Huntly. He the son of Charles Seton 2nd Earl Dunfermline and Mary Douglas Countess Dunfermline. They were third cousins.

On 25 Dec 1688 Edmund Bacon 4th Baronet (age 16) and Philippa Bacon Lady Bacon were married. She by marriage Lady Bacon of Mildenhall in Suffolk. They were third cousins.

Around 1690 William Keith 9th Earl Marischal (age 26) and Mary Drummond Countess Marischal (age 15) were married. She the daughter of James Drummond 1st Duke Perth (age 42) and Jean Douglas. He the son of George Keith 8th Earl Marischal (age 75) and Mary Hay Countess Marischal. They were third cousins.

Around 1696 Edward Coke (age 17) and Carey Newton (age 15) were married. They were third cousins.

In 1705 John Montagu 2nd Duke Montagu (age 15) and Mary Churchill Duchess Montagu (age 15) were married. She the daughter of John Churchill 1st Duke Marlborough (age 54) and Sarah Jennings Duchess Marlborough (age 44). He the son of Ralph Montagu 1st Duke Montagu (age 66) and Elizabeth Wriothesley Countess Northumberland. They were third cousins.

In 1709 Anthony Ashley-Cooper 3rd Earl Shaftesbury (age 37) and Jane Ewer Countess Shafetsbury (age 29) were married. She by marriage Countess Shaftesbury. He the son of Anthony Ashley-Cooper 2nd Earl Shaftesbury and Dorothy Manners Countess Shaftesbury. They were third cousins.

On 09 Sep 1713 Clotworthy Skeffington 4th Viscount Massereene and Catherine Chichester Visountess Massereene were married. She the daughter of Arthur Chichester 3rd Earl Donegal and Catherine Forbes (age 23). They were third cousins.

In 1718 William Widdrington 4th Baron Widdrington (age 40) and Catherine Graham were married. They were third cousins.

In 1727 Edward Moore 5th Earl Drogheda (age 26) and Sarah Ponsonby were married. She the daughter of Brabazon Ponsonby 1st Earl Bessborough (age 48) and Sarah Margetson (age 48). They were third cousins.

On 11 Oct 1731 John Russell 4th Duke Bedford (age 21) and Diana Spencer Duchess Bedford (age 21) were married. She the daughter of Charles Spencer 3rd Earl of Sunderland and Anne Churchill Countess Sunderland. He the son of Wriothesley Russell 2nd Duke Bedford and Elizabeth Howland Duchess Bedford. They were third cousins.

On 08 Nov 1742 Wilhelm Saxe Coburg Altenburg (age 41) and Anna Holstein Gottorp (age 33) were married in Hamburg. He the son of Frederick Saxe Coburg Altenburg II Duke Saxe Gotha Altenburg and Magdalena Augusta Anhalt Zerbst Anhaltzerbst Duchess Saxe Gotha Altenburg. They were third cousins.

On 11 Nov 1749 James Radclyffe 4th Earl of Newburgh (age 24) and Barbara Kemp Countess Newburgh were married. He the son of Charles Radclyffe Earl Newburgh and Charlotte Livingstone 3rd Countess Newburgh (age 55). They were third cousins. He a great grandson of King Charles II of England Scotland and Ireland.

On 31 May 1750 Victor Amadeus III King Sardinia (age 24) and Infanta Maria Antonia Spain (age 20) were married. She the daughter of Philippe V King Spain and Elisabeth Farnese Queen Consort Spain (age 57). He the son of Charles Emmanuel III King Sardinia (age 49) and Polyxena Hesse Rotenburg Queen Consort Sardinia. They were third cousins. He a great x 2 grandson of King Charles I of England, Scotland and Ireland.

Before 27 Oct 1757 John Drummond 5th Duke Perth (age 77) and Mary Stewart (age 55) were married. The difference in their ages was 22 years. She the daughter of Charles Stewart 4th Earl Traquair and Mary Maxwell Countess Traquair (age 86). He the son of James Drummond 1st Duke Perth. They were third cousins.

In 1759 Thomas Thynne 1st Marquess of Bath (age 24) and Elizabeth Bentinck Marchioness Bath (age 23) were married. She by marriage Viscountess Weymouth. She the daughter of William Bentinck 2nd Duke Portland (age 49) and Margaret Cavendish Harley 2nd Duchess Portland (age 43). They were third cousins.

On 10 Jan 1773 Frederick Hesse-Kassel (age 52) and Princess Philippine Hohenzollern (age 27) were married. No issue. The difference in their ages was 25 years. He the son of William Hesse-Kassel. They were third cousins. She a great granddaughter of King George I of Great Britain and Ireland.

On 14 Dec 1774 Hungerford Hoskyns 6th Baronet and Catherine Stanhope Lady Hoskyns were married. She by marriage Lady Hoskyns of Harewood in Herefordshire. They were third cousins.

On 07 Mar 1775 Thomas Frankland 6th Baronet (age 24) and Dorothy Smelt Lady Thirkleby (age 25) were married. They were third cousins.

On 15 Oct 1780 King Frederick Wilhelm Karl Württemberg (age 25) and Augusta Caroline Brunswick Bevern (age 15) were married. They were third cousins. He a great x 2 grandson of King George I of Great Britain and Ireland. She a great granddaughter of King George II of Great Britain and Ireland.

On 03 Jun 1781 Robert Hay-Drummond 10th Earl Kinnoul (age 30) and Sarah Harley Countess Kinnoul were married. He the son of Robert Hay-Drummond Archbishop of York. They were third cousins.

On 04 Sep 1781 John Wood of Beadnell in Northumberland (age 38) and Ann Craster (age 21) were married. She the eventual heir of her father inherited Craster Tower. Her son adopted the surname Craster. They were third cousins.

On 29 Sep 1791 Prince Frederick Hanover Duke York of York (age 28) and Frederica Charlotte Hohenzollern (age 24) were married at Charlottenburg, Berlin. She the daughter of Frederick William II King Prussia (age 47) and Crown Princess Elisabeth Christine of Prussia (age 44). He the son of King George III of Great Britain and Ireland (age 53) and Charlotte Mecklenburg Strelitz Queen Consort England (age 47). They were third cousins. She a great x 2 granddaughter of King George I of Great Britain and Ireland.

On 13 Feb 1797 Wilhelm Hesse-Kassel (age 19) and Princess Augusta of Prussia (age 16) were married. She the daughter of Frederick William II King Prussia (age 52) and Queen Frederica Louisa of Prussia (age 45). He the son of William Elector of Hesse (age 53) and Electress Wilhelmina Caroline Oldenburg (age 49). They were third cousins. He a great grandson of King George II of Great Britain and Ireland. She a great x 2 granddaughter of King George I of Great Britain and Ireland.

On 18 May 1797 King Frederick Wilhelm Karl Württemberg (age 42) and Princess Charlotte Hanover (age 30) were married. She the illegitmate daughter of King George III of Great Britain and Ireland (age 58) and Charlotte Mecklenburg Strelitz Queen Consort England (age 52). They were third cousins. He a great x 2 grandson of King George I of Great Britain and Ireland.

On 04 Feb 1807 Daniel Fleming 5th Baronet (age 22) and Ann Frederica Elizabeth Fleming Lady Fleming (age 23) were married. She by marriage Lady Fleming of Rydal in Cumbria. They were third cousins.

On 13 Jul 1817 Tsar Nicholas I of Russia (age 21) and Charlotte Hohenzollern (age 19) were married. She the daughter of Frederick William II King Prussia (age 46). They were third cousins. He a great x 3 grandson of King George I of Great Britain and Ireland. She a great x 3 granddaughter of King George I of Great Britain and Ireland.

Before 1818 George Vansittart (age 72) and Sarah Stonhouse (age 72) were married. They were third cousins.

Before 14 Jul 1819 John Somers-Cocks 2nd Earl Somers (age 31) and Caroline Yorke Countess Somers (age 24) were married. She the daughter of Philip Yorke 3rd Earl of Hardwicke (age 62) and Elizabeth Lindsay Countess Hardwicke (age 55). He the son of John Cocks 1st Earl Somers (age 59). They were third cousins.

On 07 Mar 1822 George James Welbore Agar 1st Baron Dover (age 25) and Georgiana Howard Lady Dover (age 18) were married. She the daughter of George Howard 6th Earl Carlisle (age 48) and Georgiana Cavendish Countess Carlisle (age 38). They were third cousins.

In 1823 Admiral Maurice Frederick Fitzhardinge Berkeley (age 34) and Charlotte Lennox (age 19) were married. She the daughter of Charles Lennox 4th Duke Richmond and Charlotte Gordon Duchess Richmond (age 54). He the illegitmate son of Frederick Augustus Berkeley 5th Earl Berkeley and Mary Cole. They were third cousins. He a great x 3 grandson of King Charles II of England Scotland and Ireland. She a great x 3 granddaughter of King Charles II of England Scotland and Ireland.

In 1823 Dudley Ryder 2nd Earl of Harrowby (age 24) and Frances Stuart Countess Harrowby Lincolnshire were married. She the daughter of John Stuart 1st Marquis of the Isle of Bute and Frances Coutts Marchioness Bute. He the son of Dudley Ryder 1st Earl of Harrowby (age 60) and Susanna Leveson-Gower Countess Harrowby Lincolnshire (age 50). They were third cousins.

In Jul 1835 Horace Beauchamp Seymour-Conway (age 43) and Frances Isabella Selina Poyntz Marchioness of Exeter (age 32) were married. They were third cousins. He a great x 3 grandson of King James II of England Scotland and Ireland.

On 12 Aug 1840 Francis Richard Grey (age 27) and Elizabeth Dorothy Anne Howard (age 23) were married. She the daughter of George Howard 6th Earl Carlisle (age 66) and Georgiana Cavendish Countess Carlisle (age 57). He the son of Charles Grey 2nd Earl Grey (age 76) and Mary Elizabeth Ponsonby Countess Grey (age 64). They were third cousins.

In 1842 Admiral Edward Howard 1st Baron Lanerton (age 32) and Diana Ponsonby Baroness Lanerton were married. He the son of George Howard 6th Earl Carlisle (age 68) and Georgiana Cavendish Countess Carlisle (age 58). They were third cousins.

On 25 Aug 1847 Henry Seymour Moore 3rd Marquess Drogheda (age 22) and Mary Caroline Stuart-Wortley-Mackenzie Marchioness Drogheda (age 20) were married. She by marriage Marchioness Drogheda. They were third cousins. He a great x 4 grandson of King Charles II of England Scotland and Ireland.

On 30 Apr 1850 Thomas Lyon Bowes 12th Earl Strathmore and Kinghorne (age 27) and Charlotte Maria Barrington Countess of Strathmore (age 24) were married. She by marriage Countess Strathmore and Kinghorne. They were third cousins. She a great x 4 granddaughter of King Charles II of England Scotland and Ireland.

On 07 Jun 1851 Augustus Henry Vernon 6th Baron Vernon (age 22) and Harriet Frances Maria Anson Baroness Vernon (age 23) were married. She the daughter of Thomas William Anson 1st Earl Lichfield (age 55) and Louisa Barbara Catherine Phillips Countess Lichfield (age 51). They were third cousins.

In 1857 William Fox-Strangways 4th Earl of Ilchester (age 61) and Sophia Penelope Sheffield Countess Ilchester (age 15) were married. The difference in their ages was 46 years. He the son of Henry Thomas Fox-Strangways 2nd Earl of Ilchester and Maria Digby Countess Ilchester. They were third cousins.

On 05 Feb 1857 Alfred Spencer-Churchill (age 33) and Harriett Louisa Hester Gough (age 25) were married. He the son of George Spencer-Churchill 6th Duke Marlborough (age 63) and Jane Stewart Duchess Marlborough. They were third cousins.

In 1863 William Henry Forester Denison 1st Earl Londesborough (age 28) and Edith Somerset Countess Londesborough (age 24) were married. She by marriage Baroness Londesborough of Londesborough in the East Riding of Yorkshire. She the daughter of Henry Somerset 7th Duke Beaufort and Emily Frances Smith Duchess Beaufort (age 62). They were third cousins.

In 1863 Algernon Fulke Leveson-Gower aka Egerton (age 37) and Alice Louisa Cavendish (age 25) were married. He the son of Francis Leveson Gower aka Egerton 1st Earl Ellesmere and Harriet Greville Countess Ellesmere (age 60). They were third cousins.

On 07 Jun 1864 Frederick Charles Cavendish (age 27) and Lucy Caroline Lyttelton (age 22) were married. No issue. He the son of William Cavendish 7th Duke Devonshire (age 56) and Blanche Georgiana Howard Duchess Devonshire. They were third cousins.

Before 14 Apr 1867 Prince Frederick Christian Oldenburg (age 36) and Helena Windsor (age 20) were married. She the daughter of Prince Albert Saxe Coburg Gotha and Queen Victoria of the United Kingdom (age 47). He the son of Christian August Oldenburg II Duke Schleswig Holstein Sonderburg Augustenburg (age 68) and Louise Sophie Danneskiold Samsøe Duchess Schleswig Holstein Sonderburg Augustenburg. They were third cousins. He a great x 3 grandson of King George II of Great Britain and Ireland.

On 10 Aug 1867 William Wentworth-Fitzwilliam (age 28) and Laura Maria Theresa Beauclerk (age 18) were married. He the son of William Thomas Wentworth-Fitzwilliam 6th and 4th Earl Fitzwilliam (age 51) and Frances Harriet Douglas Countess Fitzwilliam. They were third cousins. She a great x 4 granddaughter of King Charles II of England Scotland and Ireland.

On 04 Feb 1869 Arthur Rice 6th Baron Dynevor (age 33) and Selina Lascelles (age 28) were married. They were third cousins.

Before 19 Mar 1879 Victor Alexander Grosvenor (age 25) and Sibell Mary Lumley (age 23) were married. She the daughter of Richard Lumley 9th Earl Scarborough (age 65) and Adeliza Drummond Countess Scarborough. He the son of Hugh Lupus Grosvenor 1st Duke Westminster (age 53) and Constance Leveson-Gower Duchess Westminster (age 44). They were third cousins.

On 29 Nov 1879 Alfonso XII King Spain (age 22) and Maria Christina of Austria Queen Consort Spain (age 21) were married at Madrid. She by marriage Queen Consort Spain. He the son of Francisco de Asís King Consort Spain (age 57) and Isabella II Queen Spain (age 49). They were third cousins.

On 05 Nov 1881 Henry Ulrick Lascelles 5th Earl Harewood (age 35) and Florence Katharine Bridgeman Countess Harewood (age 22) were married. She the daughter of Orlando Bridgeman 3rd Earl Bradford (age 62) and Selina Weld-Forester Countess Bradford. He the son of Henry Thynne Lascelles 4th Earl Harewood (age 57) and Elizabeth Joanna Burgh. They were third cousins.

On 13 Apr 1882 Lyonel Plantagenet Tollemache (age 21) and Blanche Sybil King were married. They were third cousins.

On 11 Aug 1887 William Henry Francis Denison 2nd Earl Londesborough (age 23) and Grace Adelaide Fane Countess Londesborough (age 26) were married. She the daughter of Francis William Henry Fane 12th Earl of Westmoreland (age 61) and Adelaide Ida Curzon Howe Countess of Westmoreland (age 52). He the son of William Henry Forester Denison 1st Earl Londesborough (age 53) and Edith Somerset Countess Londesborough (age 49). They were third cousins.

On 15 Oct 1891 Lieutenant-Colonel Gilbert Redvers Heathcote 8th Baronet (age 36) and Pauline Trevelyan were married. They were third cousins.

On 26 Jun 1894 Hugh Molesworth-St Aubyn 13th Baronet (age 29) and Emma Sybil Wake Lady Morice (age 29) were married at St George's Church, Hanover Square. They were third cousins.

On 01 Nov 1894 James Albert Edward Hamilton 3rd Duke Abercorn (age 24) and Rosalind Cecilia Caroline Bingham Duchess Abercorn (age 25) were married at St Paul's Church, Knightsbridge. She the daughter of Charles George Bingham 4th Earl Lucan (age 64) and Cecilia Catherine Gordon-Lennox Countess Lucan (age 56). He the son of James Hamilton 2nd Duke Abercorn (age 56) and Mary Anna Curzon Howe Duchess Abercorn (age 46). They were third cousins. He a great x 5 grandson of King Charles II of England Scotland and Ireland. She a great x 5 granddaughter of King Charles II of England Scotland and Ireland.

On 24 Jun 1896 William Charles de Meuron "Billy" Wentworth-Fitzwilliam 7th and 5th Earl Fitzwilliam (age 23) and Maud Frederica Elizabeth Dundas Countess Fitzwilliam (age 18) were married at St Paul's Cathedral [Map]. She the daughter of Lawrence Dundas 1st Marquess Zetland (age 51) and Lilian Selina Elizabeth Lumley Marchioness Zetland (age 44). They were third cousins. He a great x 5 grandson of King Charles II of England Scotland and Ireland.

Before 27 Jul 1896 Osbert Victor George Atheling Lumley (age 38) and Constance Ellinor Wilson-Patten (age 24) were married. He the son of Richard Lumley 9th Earl Scarborough and Adeliza Drummond Countess Scarborough. They were third cousins.

On 28 Apr 1903 Major George Henry Edwardes (age 25) and Olive Kerr (age 24) were married. They were third cousins.

On 15 Sep 1904 Josceline Reginald Heber-Percy (age 24) and Katharine Louisa Victoria Percy (age 22) were married at St Mary's Church, Warwick [Map]. They were third cousins.

On 14 Dec 1905 Henry Arthur Mornington Wellesley 3rd Earl Cowley (age 39) and Millicent Florence Eleanor Wilson Countess Cowley (age 33) were married at Colombo, Sri Lanka. She by marriage Countess Cowley. He the son of William Henry Wellesley 2nd Earl Cowley and Emily Gwendoline Williams Countess Cowley (age 66). They were third cousins.

In or before 1906 Wilhelm Hohenzollern (age 23) and Princess Cecilie Mecklenburg Schwerin (age 19) were married. He the son of Wilhelm Hohenzollern (age 46) and Empress Auguste Viktoria Oldenburg (age 47). They were third cousins. He a great grandson of Queen Victoria of the United Kingdom.

In 1913 Henry Arthur Mornington Wellesley 3rd Earl Cowley (age 46) and Millicent Florence Eleanor Wilson Countess Cowley (age 40) were divorced. She cited "his desertion and misconduct with Mrs. Geoffrey Charles Buxton". Henry Arthur Mornington Wellesley 3rd Earl Cowley (age 46) had been named as a correspondent in the divorce suite of Geoffrey Charles Buxton against his wife.

In 1917 Edward Montagu Cavendish Stanley (age 22) and Sibyl Louise Beatrix Cadogan (age 24) were married. He the son of Edward George Villiers Stanley 17th Earl of Derby (age 51) and Alice Maude Olivia Montagu Countess Derby (age 54). They were third cousins.

On 16 Feb 1926 John Fremantle 4th Baron Cottesloe (age 25) and Elizabeth Harris Baroness Cottesloe (age 20) were married. She the daughter of James Edward Harris 5th Earl Malmesbury (age 53) and Dorothy Gough-Calthorpe Countess of Malmesbury (age 40). They were third cousins.

On 22 Apr 1933 Francis Anthony Baring (age 23) and Rose Gwendolen Louisa McDonnell (age 23) were married. She the daughter of Randall McDonnell 7th Earl of Antrim and Margaret Isabel Talbot Countess of Antrim. They were third cousins.

In 1936 David Brand 5th Viscount Hampden (age 33) and Imogen Alice Rice Viscountess Hampden (age 32) were married. They were third cousins.

On 22 Nov 1938 Ivor Grosvenor Guest 2nd Viscount Wimborne (age 35) and Mabel Edith Fox-Strangways Viscountess Wimborne (age 20) were married. She the daughter of Giles Fox-Strangways 6th Earl of Ilchester (age 64) and Helen Vane-Tempest-Stewart Countess Ilchester (age 62). They were third cousins.

In 1944 John Fremantle 4th Baron Cottesloe (age 43) and Elizabeth Harris Baroness Cottesloe (age 37) were divorced.

On 26 Jul 1951 William Douglas-Home Baron Dacre (age 39) and Rachel Leila Brand 27th Baroness Dacre (age 21) were married. He the son of Charles Cospatrick Douglas-Home 13th Earl of Home (deceased) and Lilian Lambton Countess of Home (age 69). They were third cousins.

On 09 Sep 1954 James Lowther 7th Earl Londsdale (age 31) and Jennifer Lowther Countess Lonsdale (age 22) were married. She by marriage Countess Lonsdale. They were third cousins.

On 15 Oct 1955 John Parker 6th Earl Morley (age 32) and Katherine Molesworth-St Aubyn Countess Morley were married. They were third cousins.

On 07 Jan 1956 Henry Herbert 7th Earl of Carnarvon (age 31) and Jean Margaret Wallop Countess of Carnarvon (age 20) were married at St James' Episcopal Church, New York. He the son of Henry Herbert 6th Earl Carnarvon (age 57) and Anne Catherine Tredick Wendell Countess Carnarvon (age 55). They were third cousins.

In 1962 Juan Carlos I King Spain (age 23) and Sophia Glücksburg Queen Consort Spain (age 24) were married. She by marriage Queen Consort Spain. She the daughter of Paul I King Greece (age 60) and Frederica Hanover Queen Consort Greece (age 44). They were third cousins. He a great x 2 grandson of Queen Victoria of the United Kingdom. She a great x 2 granddaughter of Queen Victoria of the United Kingdom.

In 1962 James Lowther 7th Earl Londsdale (age 39) and Jennifer Lowther Countess Lonsdale (age 29) were divorced.

Godfrey "Bearded" Ardennes III Duke Lower Lorraine and Beatrice Ardennes were married. She the daughter of Frederick Ardennes II Duke Lower Lorraine and Matilda Swabia Duchess Lower Lorraine. He the son of Gothelo Ardennes Duke Lower Lorraine Duke Upper Lorraine. They were third cousins.

Baldwin Flanders II Count Boulogne and Adelina Gerulfing Countess Boulogne and Ponthieu were married. She by marriage Countess Boulogne. She the daughter of Arnulf Gerulfing Count Holland and Luitgarde Luxemburg Countess Holland. He the son of Arnulf Flanders III Count Boulogne. They were third cousins.

Robert Dampierre Count Marle and Joan Montfort were married. He the son of Robert Dampierre III Count Flanders and Yolande Burgundy II Countess Nevers and Flanders. They were third cousins. She a great granddaughter of King Henry III of England.

Henry Poole and Beatrix Brydges were married. They were third cousins.

Louis "Blind" Bivinids and Adelaide Welf were married. She the daughter of Rudolph I King Burgundy. They were third cousins.

Antoine King Navarre and Jeanne Albret III Queen Navarre were married. She by marriage Duchess Vendôme. She the daughter of King Henry II of Navarre and Marguerite Valois Orléans Queen Consort Navarre. He the son of Charles Bourbon Duke Vendôme and Françoise Valois Countess Vendôme. They were third cousins.

Raoul Coucy and Alix II Dreux were married. The difference in their ages was 21 years. She the daughter of Robert "Great" Capet I Count Dreux and Agnes Baudemont Countess Dreux. They were third cousins.

William Douglas 7th Earl Morton and Anne Keith Countess Morton were married. She the daughter of George Keith 5th Earl Marischal and Margaret Home Countess Marischal. He the son of Robert Douglas Master of Morton and Jean Lyon Countess Angus and Morton. They were third cousins.

Roger Boyle 2nd Earl Orrery and Mary Sackville Countess Orrery were married. She the daughter of Richard Sackville 5th Earl Dorset and Frances Cranfield Countess Dorset. He the son of Roger Boyle 1st Earl Orrery and Margaret Howard Countess Orrery. They were third cousins.

Thomas Vernon and Anne Ludlow were married. They were third cousins. She a great x 3 granddaughter of Henry IV King England.

Ralph Neville and Mary Paston were married. He the son of Ralph Neville 3rd Earl of Westmoreland and Isabel Booth. They were third cousins. He a great x 4 grandson of King Edward III of England. She a great x 3 granddaughter of King Edward III of England.

John Segrave and Blanche Mowbray Baroness Poynings were married. He the son of John Segrave 4th Baron Segrave and Margaret Plantagenet 2nd Countess Norfolk. They were third cousins. He a great grandson of King Edward "Longshanks" I of England. She a great x 2 granddaughter of King Henry III of England.

Charles Boyle 4th Earl Cork 4th Earl Orrery and Elizabeth Cecil Countess Cork were married. She by marriage Countess Cork. She the daughter of John Cecil 5th Earl Exeter and Anne Cavendish Countess Exeter. He the son of Roger Boyle 2nd Earl Orrery. They were third cousins.

Robert Rich 2nd Baronet and Mary Rich were married. They were third cousins.

John Gordon and Sophia Hay were married. She the daughter of Francis Hay 9th Earl Erroll and Elizabeth Douglas Countess Erroll. He the son of George Gordon 1st Marquess Huntly and Henrietta Stewart Marchioness Huntly. They were third cousins.

Andrew William Kerr and Marie Constance Kerr were married. The difference in their ages was 22 years. They were third cousins.

John Hastings 11th Baron Hastings and Catherine Aske Baroness Hastings were married. They were third cousins. She a great x 4 granddaughter of King Edward III of England.

Philip Capet Count Boulogne and Matilda Dammartin Queen Consort Portugal were married. She the daughter of Renaud Dammartin I Count Boulogne, Dammartin and Aumale and Ida Metz Countess Boulogne. He the son of King Philip II of France and Agnes Andechs Queen Consort France. They were third cousins. He a great x 3 grandson of King William "Conqueror" I of England. She a great x 3 granddaughter of King William "Conqueror" I of England.

John Grey and Mary Browne were married. He the son of Thomas Grey 2nd Marquess Dorset and Margaret Wotton Marchioness Dorset. They were third cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

William Dampierre III Count Flanders and Beatrix Reginar Countess Flanders were married. She by marriage Countess Flanders. She the daughter of Henry Reginar II Duke Brabant and Marie Swabia Duchess Brabant. He the son of William Dampierre II Count Flanders and Margaret II Countess Flanders. They were third cousins. He a great x 4 grandson of King William "Conqueror" I of England. She a great x 4 granddaughter of King William "Conqueror" I of England.

Charles Gerard and Penelope Fitton were married. They were third cousins.

William Douglas 3rd Duke Touraine and Janet Lindsay Countess Wigtown were married. She the daughter of David Lindsay 3rd Earl Crawford. He the son of Archibald Douglas 2nd Duke Touraine and Euphemia Graham Lady Hamilton. They were third cousins.

Lewis Clifford and Eleanor Mowbray were married. They were third cousins. He a great x 5 grandson of King John "Lackland" of England. She a great x 2 granddaughter of King Henry III of England.

Before 1611 Robert Strode and Mary Luttrell were married. They were third cousins.

Alfonso Este II Duke Ferrara and Barbara Habsburg Spain Duchess Ferrara were married. She by marriage Duchess Ferrara. She the daughter of Ferdinand I Holy Roman Emperor and Anne Jagiellon Holy Roman Empress. They were third cousins. She a great x 5 granddaughter of King Edward III of England.

Richard Musgrave and Joan Clifford were married. They were third cousins. She a great x 4 granddaughter of King Edward III of England.

Robert Ferrers 5th Baron Ferrers of Chartley and Margaret Despencer Baroness Ferrers of Chartley were married. They were third cousins. He a great x 3 grandson of King Edward "Longshanks" I of England. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

Francis Hay 9th Earl Erroll and Mary Stewart Countess Erroll were married. She by marriage Countess Erroll. She the daughter of John Stewart 4th Earl Atholl and Elizabeth Gordon Countess Atholl. He the son of Andrew Hay 8th Earl Erroll and Jean Hay. They were third cousins.

Louis François Bourbon Condé Conti and Louise Diane Bourbon were married. She the daughter of Philippe Bourbon II Duke Orléans and Françoise Marie Bourbon Duchess Orléans. They were third cousins. He a great x 3 grandson of King James I of England and Ireland and VI of Scotland. She a great x 3 granddaughter of King James I of England and Ireland and VI of Scotland.

Henry Arthur Lascelles and Caroline Maria Gore were married. They were third cousins.

Louis X King France I Navarre and Clementia Hungary Queen Consort France were married. She by marriage Queen Consort of France. She the daughter of Charles Martel King Hungary and Clementia Habsburg. He the son of Philip "The Fair" IV King France and Joan Blois I Queen Navarre. They were third cousins. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.

Baldwin Flanders V Count Hainault and Margaret Metz Countess Hainault and Flanders were married. She by marriage Countess Hainault. She the daughter of Thierry Metz Count Flanders and Sibylla Anjou Countess Essex and Flanders. He the son of Baldwin Flanders IV Count Hainault and Alice Namur Countess Hainault. They were third cousins.

Henry Herbert 4th Baron Herbert Chirbury and Catherine Newport Baroness Herbert Chirbury were married. She the daughter of Francis Newport 1st Earl Bradford and Diana Russell Countess Bradford. They were third cousins. He a great x 5 grandson of King Henry VII of England and Ireland.

Rhys ap Tewdwr King Deheubarth and Gwladys ferch Rhiwallon Mathrafal Queen Consort Deheubarth were married. They were third cousins.

Hugh IV Duke Burgundy and Beatrix Blois Duchess Burgundy were married. She by marriage Duchess Burgundy. The difference in their ages was 28 years. She the daughter of Theobald IV King Navarre and Margaret Bourbon Queen Consort Navarre. He the son of Odo III Duke Burgundy and Alice Vergy Duchess Burgundy. They were third cousins. He a great x 4 grandson of King William "Conqueror" I of England. She a great x 4 granddaughter of King William "Conqueror" I of England.