Biography of John Montfort V Duke Brittany 1339-1399
Paternal Family Tree: Capet
In 1329 [his father] John Montfort IV Duke Brittany (age 34) and [his mother] Joanna Dampierre Duchess Brittany (age 34) were married at Chartres [Map]. She the daughter of Louis Dampierre I Count Nevers and Joan Rethel Countess Nevers and Rethel. They were third cousin once removed. He a great grandson of King Henry III of England. 
In 1339 John Montfort V Duke Brittany was born to John Montfort IV Duke Brittany (age 44) and Joanna Dampierre Duchess Brittany (age 44). He a great x 2 grandson of King Henry III of England.
On 30 Apr 1341 [his uncle] John Capet III Duke Brittany (age 55) died. Earl Richmond extinct. The succession of the Duchy of Brittany was disputed between Joan "Lame" Capet Countess Penthièvre (age 22) and [his father] John Montfort IV Duke Brittany (age 46) leading to the War of the Breton Succession. [his mother] Joanna Dampierre Duchess Brittany (age 46) by marriage Duchess Brittany 1221 Dreux. His niece Joan "Lame" Capet Countess Penthièvre (age 22) succeeded Duchess Brittany 1221 Dreux. Charles "Saint" Chatillon Duke Brittany (age 22) by marriage Duke Brittany 1221 Dreux. His half brother John Montfort IV Duke Brittany (age 46) succeeded IV Duke Brittany 1221 Dreux.
On 16 Sep 1345 [his father] John Montfort IV Duke Brittany (age 50) died at Hennebont. His son John Montfort V Duke Brittany (age 6) succeeded V Duke Brittany 1221 Dreux. [his future wife] Mary Plantagenet Duchess Brittany by marriage Duchess Brittany 1221 Dreux.
On 19 May 1359 , or thereabouts, a double-royal wedding celebration took place at Reading Abbey [Map] whereby two children of [his future father-in-law] King Edward III of England (age 46) were married:
[his future brother-in-law] John of Gaunt 1st Duke Lancaster (age 19) and Blanche Plantagenet Duchess Lancaster (age 14) were married. She by marriage Countess Richmond. She the daughter of Henry of Grosmont 1st Duke Lancaster (age 49) and Isabel Beaumont Duchess Lancaster (age 39). He the son of King Edward III of England (age 46) and Philippa of Hainault Queen Consort England (age 44). They were half second cousin once removed. She a great x 2 granddaughter of King Henry III of England. 
John Hastings 2nd Earl Pembroke (age 11) and [his future sister-in-law] Margaret Plantagenet Countess of Pembroke (age 12) were married. At the time John Hastings 2nd Earl Pembroke (age 11) was a ward of King Edward III of England (age 46) who would enjoy the benefit of the substantial revenue of the Earldom of Pembroke until John came of age nine years later in 1368. She died two or so years later probably of plague. She the daughter of King Edward III of England (age 46) and Philippa of Hainault Queen Consort England (age 44). He the son of Laurence Hastings 1st Earl Pembroke and Agnes Mortimer Countess of Pembroke (age 42). They were half fourth cousins. He a great x 5 grandson of King John "Lackland" 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 Sep 1361 [his wife] Mary Plantagenet Duchess Brittany (age 16) died.
On 25 Dec 1361 [his former sister-in-law] Margaret Plantagenet Countess of Pembroke (age 15) died probably of plague. She was buried at Abingdon Abbey [Map].
On 05 Sep 1363 Hugh Courtenay (age 18) and [his future sister-in-law] Maud Holland (age 4) were married. She the daughter of Thomas Holland 1st Earl Kent and Joan "Fair Maid of Kent" Princess Wales (age 34). They were half second cousin once removed. He a great x 2 grandson of King Edward "Longshanks" I of England. She a great granddaughter of King Edward "Longshanks" I of England. 
On 29 Sep 1364 Battle of Auray decided the Breton Succession in favour of John Montfort V Duke Brittany (age 25). The Breton and English army was commanded by John Chandos (age 44) and included William Latimer 4th Baron Latimer of Corby (age 34), Miles Stapleton (age 44) and Hugh Calverley (age 40). Charles "Saint" Chatillon Duke Brittany (age 45) was killed. Bertrand Geusclin (age 44) surrendered. 
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.
On 20 Sep 1370 [his brother-in-law] Edward Plantagenet (age 6) died of plague at Bordeaux [Map].
In 1372 John Montfort V Duke Brittany (age 33) succeeded 6th Earl Richmond. [his wife] Joan Holland Duchess Brittany (age 22) by marriage Countess Richmond.
In Sep 1374 [his mother] Joanna Dampierre Duchess Brittany (age 79) died.
On 23 Apr 1376 [his former father-in-law] King Edward III of England (age 63) created a number of new Garter Knights ...
54th John Montfort V Duke Brittany (age 37).
55th Thomas Banastre (age 42).
56th William Ufford 2nd Earl Suffolk (age 37).
57th Hugh Stafford 2nd Earl Stafford (age 40).
58th [his brother-in-law] Thomas Holland 2nd Earl Kent (age 26). He the son of [his mother-in-law] Joan "Fair Maid of Kent" Princess Wales (age 47) whose second husband was Edward III's son [his former brother-in-law] Edward "Black Prince" (age 45).
59th Thomas Percy 1st Earl of Worcester (age 33) was appointed 59th. He the son of Mary Plantagenet Baroness Percy daughter of Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster who was the first cousin of Edward III's father King Edward II of England.
60th William Beauchamp 1st Baron Bergavenny (age 33).
In 1380 Waleran Luxemburg (age 25) and [his sister-in-law] 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. 
In 1384 [his wife] Joan Holland Duchess Brittany (age 34) died.
On 02 Oct 1386 John Montfort V Duke Brittany (age 47) and Joanna of Navarre Queen Consort England (age 16) were married at Saillé [Map]. She by marriage Duchess Brittany 1221 Dreux, Countess Richmond. His third marriage, her first. The marriage proceeded when her father Charles "Bad" II King Navarre (age 53) agreed to give his daughter 120,000 gold francs and to pay 6,000 francs owed to John, duke of Brittany (age 47), for the rent of certain lands. He, John, gave her the cities of Nantes [Map] and Guerrand [Map]. The difference in their ages was 31 years. She the daughter of Charles "Bad" II King Navarre (age 53) and Joan Valois Queen Consort Navarre. They were second cousin twice removed. He a great x 2 grandson of King Henry III of England. She a great x 4 granddaughter of King Henry III of England.
On 12 Aug 1387 [his son] Jeanne Montfort was born to John Montfort V Duke Brittany (age 48) and [his wife] Joanna of Navarre Queen Consort England (age 17). He a great x 3 grandson of King Henry III of England.
In Oct 1388 [his daughter] Isabelle Montfort was born to John Montfort V Duke Brittany (age 49) and [his wife] Joanna of Navarre Queen Consort England (age 18). She died two months later in Dec 1388. She a great x 3 granddaughter of King Henry III of England.
On 07 Dec 1388 [his son] Jeanne Montfort (age 1) died.
After 1389 [his sister-in-law] Bonne Évreux (age 25) died.
On 24 Dec 1389 [his son] John Montfort V Duke Brittany was born to John Montfort V Duke Brittany (age 50) and [his wife] Joanna of Navarre Queen Consort England (age 19). He a great x 3 grandson of King Henry III of England.
In 1391 [his former sister-in-law] Maud Holland (age 32) died.
On 18 Feb 1391 [his daughter] Marie Montfort Duchess Alençon was born to John Montfort V Duke Brittany (age 52) and [his wife] Joanna of Navarre Queen Consort England (age 21). She a great x 3 granddaughter of King Henry III of England.
In 1392 [his daughter] Marguerite Montfort Viscountess Rohan was born to John Montfort V Duke Brittany (age 53) and [his wife] Joanna of Navarre Queen Consort England (age 22). She a great x 3 granddaughter of King Henry III of England.
On 24 Aug 1393 [his son] Arthur Montfort III Duke Brittany was born to John Montfort V Duke Brittany (age 54) and [his wife] Joanna of Navarre Queen Consort England (age 23). He a great x 3 grandson of King Henry III of England.
In 1395 [his son] Richard Montfort was born to John Montfort V Duke Brittany (age 56) and [his wife] Joanna of Navarre Queen Consort England (age 25). He a great x 3 grandson of King Henry III of England.
In 1397 [his daughter] Blanche Montfort Countess Armagnac was born to John Montfort V Duke Brittany (age 58) and [his wife] Joanna of Navarre Queen Consort England (age 27). She a great x 3 granddaughter of King Henry III of England.
On 01 Nov 1399 John Montfort V Duke Brittany (age 60) died. His son [his son] John Montfort V Duke Brittany (age 9) succeeded V Duke Brittany 1221 Dreux.
On 07 Feb 1403 King Henry IV of England (age 35) and [his former wife] Joanna of Navarre Queen Consort England (age 33) were married at Winchester, Hampshire [Map]. Joanna of Navarre Queen Consort England (age 33) was crowned Queen Consort England. His third marriage, her second. She had eight children with her first husband but, despite ten years of marriage, none with Henry. She the daughter of Charles "Bad" II King Navarre and Joan Valois Queen Consort Navarre. He the son of John of Gaunt 1st Duke Lancaster and Blanche Plantagenet Duchess Lancaster. They were third cousins. He a grandson of King Edward III of England. She a great x 4 granddaughter of King Henry III of England. 
On 10 Jun 1437 [his former wife] Joanna of Navarre Queen Consort England (age 67) died at Havering atte Bower [Map].
[his son] John Montfort V Duke Brittany and Joan Valois Duchess Brittany were married. She by marriage Duchess Brittany 1341 War of Sucession. She the daughter of Charles "Beloved Mad" VI King France and Isabeau Wittelsbach Queen Consort France. He the son of John Montfort V Duke Brittany and Joanna of Navarre Queen Consort England. They were second cousins. He a great x 3 grandson of King Henry III of England. She a great x 5 granddaughter of King Henry III of England. 
Kings Wessex: Great x 9 Grand Son of King Edmund "Ironside" I of England
Kings England: Great x 2 Grand Son of King Henry III of England
Kings Scotland: Great x 7 Grand Son of Malcolm III King Scotland
Kings Franks: Great x 6 Grand Son of Louis VII King Franks
Kings France: Great x 6 Grand Son of Louis "Fat" VI King France
Anne of Brittany Queen Consort France x 1
Marie Françoise Élisabeth of Savoy Queen Consort of Portugal x 1
Great x 4 Grandfather: Robert Capet II Count Dreux
Great x 3 Grandfather: Peter of Dreux aka Mauclerc Duke Brittany
Great x 4 Grandmother: Yolande Coucy Countess Dreux
Great x 2 Grandfather: John "The Red" Capet I Duke Brittany 4 x Great Grand Son of King Henry I "Beauclerc" England
Great x 4 Grandfather: Guy Thouars
Great x 3 Grandmother: Alix Thouars Duchess of Brittany 3 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandmother: Constance Penthièvre Duchess Brittany 2 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 1 Grandfather: John Capet II Duke Brittany 5 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandfather: Theobald Blois III Count Champagne
2 x Great Grand Son of King William "Conqueror" I of England
Great x 3 Grandfather: Theobald IV King Navarre 3 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandmother: Blanche Ramirez
Great x 2 Grandmother: Blanche "Navarre" Blois Duchess Brittany 4 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandfather: Guichard IV of Beaujeu
Great x 3 Grandmother: Agnes of Beaujeu Countess Savoy
GrandFather: Arthur Capet Duke Brittany Grand Son of King Henry III of England
Great x 4 Grandfather: King Henry "Curtmantle" II of England Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandfather: King John "Lackland" of England Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Eleanor of Aquitaine Queen Consort Franks and England
Great x 2 Grandfather: King Henry III of England Son of King John "Lackland" of England
Great x 4 Grandfather: Aymer Angoulême I Count Angoulême
Great x 3 Grandmother: Isabella of Angoulême Queen Consort England
Great x 4 Grandmother: Alice Courtenay Countess Angoulême
Great x 1 Grandmother: Beatrice Plantagenet Daughter of King Henry III of England
Great x 4 Grandfather: Alfonso Barcelona II Count Provence
Great x 3 Grandfather: Raymond Berenguer Provence IV Count Provence
Great x 4 Grandmother: Gersenda II Sabran Countess Provence
Great x 2 Grandmother: Eleanor of Provence Queen Consort England
Great x 4 Grandfather: Thomas Savoy I Count Savoy
Great x 3 Grandmother: Beatrice Savoy Countess Provence
Great x 4 Grandmother: Margaret Geneva Countess Savoy
Father: John Montfort IV Duke Brittany Great Grand Son of King Henry III of England
Great x 4 Grandfather: Robert Capet II Count Dreux
Great x 3 Grandfather: Robert Capet III Count Dreux
Great x 4 Grandmother: Yolande Coucy Countess Dreux
Great x 2 Grandfather: John Capet I Count Dreux
Great x 4 Grandfather: Thomas St Valery
Great x 3 Grandmother: Aénor de Saint-Valéry
Great x 4 Grandmother: Adele Ponthieu
Great x 1 Grandfather: Robert Capet IV Count Dreux
Great x 4 Grandfather: Guy Dampierre
Great x 3 Grandfather: Archambaud "Great" Dampierre
Great x 4 Grandmother: Mathilde Bouron
Great x 2 Grandmother: Marie Dampierre Countess Dreux
Great x 3 Grandmother: Beatrice Montluçon
GrandMother: Yolande Capet Duchess Brittany 5 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandfather: Simon "Elder" Montfort 5th Earl of Leicester
Great x 3 Grandfather: Amaury Montfort 2 x Great Grand Son of King Henry I "Beauclerc" England
Great x 4 Grandmother: Alix Montmorency Great Grand Daughter of King Henry I "Beauclerc" England
Great x 2 Grandfather: Jean Montfort 3 x Great Grand Son of King Henry I "Beauclerc" England
Great x 4 Grandfather: Guigues VI Viennois
Great x 3 Grandmother: Beatrix Viennois
Great x 1 Grandmother: Beatrice Montfort Countess Dreux 4 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandfather: Geoffrey Chateaudun V Viscount Châteaudun
Great x 3 Grandfather: Geoffrey Chateaudun VI Viscount Châteaudun
Great x 2 Grandmother: Jeanne Chateaudun
Great x 3 Grandmother: Clemence Roches Countess Blois
John Montfort V Duke Brittany 2 x Great Grand Son of King Henry III of England
Great x 4 Grandfather: Guy Dampierre
Great x 3 Grandfather: William Dampierre II Count Flanders
Great x 4 Grandmother: Mathilde Bouron
Great x 2 Grandfather: Guy Dampierre Count Flanders 4 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandfather: Baldwin IX Count Flanders VI Count Hainault
Great x 3 Grandmother: Margaret II Countess Flanders 3 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandmother: Marie Blois Countess Flanders 2 x Great Grand Daughter of King William "Conqueror" I of England
Great x 1 Grandfather: Robert Dampierre III Count Flanders 5 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandfather: William "Red" Béthune II Lord Bethune
Great x 3 Grandfather: Robert VII Lord Bethune
Great x 2 Grandmother: Mathilde Bethune
GrandFather: Louis Dampierre I Count Nevers 6 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandfather: Odo III Duke Burgundy 3 x Great Grand Son of King William "Conqueror" I of England
Great x 3 Grandfather: Hugh IV Duke Burgundy 4 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandmother: Alice Vergy Duchess Burgundy
Great x 2 Grandfather: Odo Burgundy 5 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandfather: Robert Capet III Count Dreux
Great x 3 Grandmother: Yolande Capet Duchess Burgundy
Great x 4 Grandmother: Aénor de Saint-Valéry
Great x 1 Grandmother: Yolande Burgundy II Countess Nevers and Flanders 6 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandfather: Archambaud "Great" Dampierre
Great x 3 Grandfather: Archambaud "Young" Dampierre
Great x 4 Grandmother: Alix Forez
Great x 2 Grandmother: Matilda Dampierre
Great x 4 Grandfather: Guy Chatillon IV Count Saint Pol
Great x 3 Grandmother: Yolande Chatillon
Mother: Joanna Dampierre Duchess Brittany 7 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandfather: Manasses IV Count Rethel
Great x 3 Grandfather: Hugh Rethel II Count Rethel
Great x 2 Grandfather: Manasses V Count Rethel
Great x 1 Grandfather: Hugh IV Count Rethel
GrandMother: Joan Rethel Countess Nevers and Rethel
