26 Dec is in December.
On 16 Dec 956 or 26 Dec 956 Archbishop Wulfstan died at Oundle [Map].
In 26 Dec 1164 King Henry "Curtmantle" II of England (age 31) banished all of Thomas Becket's (age 45) relatives from England. Around 400 people were affected. They were stripped of their possessions and shipped to Flanders.
On 26 Dec 1194 Frederick I King Jerusalem II Holy Roman Emperor was born to Henry Hohenstaufen VI Holy Roman Emperor (age 29).
On 26 Dec 1194 Aubrey de Vere 1st Earl of Oxford (age 79) died. His son Aubrey de Vere 2nd Earl of Oxford (age 31) succeeded 2nd Earl of Oxford 2C 1141.
On 26 Dec 1249 Edmund "Almain" 2nd Earl Cornwall was born to Richard of Cornwall 1st Earl Cornwall (age 40) and Sanchia Provence Queen Consort Germany (age 21). He a grandson of King John "Lackland" of England.
On 25 or 26 Dec 1251 Alexander III King Scotland (age 10) and Margaret Queen of Scotland (age 11) were married at York Minster [Map]. She by marriage Queen Consort Scotland. The couple remained in York until Jan 1252 after which they travelled to Edinburgh [Map]. She the daughter of King Henry III of England (age 44) and Eleanor of Provence Queen Consort England (age 28). He the son of Alexander II King Scotland and Marie Coucy (age 33). They were half fourth cousins. He a great x 3 grandson of King Henry I "Beauclerc" England. 
On 26 Dec 1352 John Plantagenet 3rd Earl Kent (age 22) died. He was buried at Greyfriars Church Winchester [Map]. Earl Kent 5C 1321 extinct. His sister Joan "Fair Maid of Kent" Princess Wales (age 24) succeeded 5th Baroness Wake of Liddell. Some source suggest she also succeeded as 4th Countess of Kent but this is inconsistent with 1. her husband being created Earl of Kent as a new creation, and 2. her son not succeeding to the original Earldom?
On 26 Dec 1357 William Deincourt 2nd Baron Deincourt was born to William Deincourt 1st Baron Deincourt (age 56) at Kirkby Bellars, Leicestershire.
On 26 Dec 1360 Thomas Holland 1st Earl Kent (age 46) died. His son Thomas Holland 2nd Earl Kent (age 10) succeeded 2nd Earl Kent 6C 1360.
Henry Machyn's Diary. 26 Dec 1562. The xxvj day of Desember cam tydynges unto the cowrt thatt the prynse of Condutt (age 32) and the duke of Gwys (age 43) mett in the [field,] and that the prynse was taken, and mony [many] taken and slayne, [and many] taken pressonars.
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 26 Dec 1613 Robert Carr 1st Earl Somerset (age 26) and Frances Howard Countess Essex and Somerset (age 23) were married. She by marriage Countess Somerset. She the daughter of Thomas Howard 1st Earl Suffolk (age 52) and Catherine Knyvet Countess Suffolk (age 49).
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Her marriage with her first husband Robert Devereux 3rd Earl Essex (age 22) had been annulled on the grounds of his impotence three months before causing something of a scandal.
On 26 Dec 1639 Lewis Boyle 1st Viscount Boyle (age 20) and Elizabeth Feilding Countess Guildford were married at the Chapel Royal, Whitehall Palace. She the daughter of William Feilding 1st Earl Denbigh (age 52) and Susan Villiers Countess Denbigh (age 56). He the son of Richard Boyle 1st Earl Cork (age 73) and Catherine Fenton Countess Cork.
On 26 Dec 1678 Charles Cockayne 3rd Viscount Cullen (age 20) and Catherine Willoughby (age 23) were married.
Evelyn's Diary. 26 Dec 1688. The Peers and such Commoners as were members of the Parliament at Oxford, being the last of Charles II meeting, desire the Prince of Orange (age 38) to take on him the disposal of the public revenue till a convention of Lords and Commons should meet in full body, appointed by his circular letters to the shires and boroughs, 22d of January. I had now quartered upon me a Lieutenant-Colonel and eight horses.
On 26 Dec 1702 Fitton Gerard 3rd Earl Macclesfield (age 39) died. Earl Macclesfield 1C 1679 extinct.
On 26 Dec 1727 Other Windsor 2nd Earl Plymouth (age 48) died. His son Other Windsor 3rd Earl Plymouth (age 20) succeeded 3rd Earl Plymouth 2C 1682, 9th Baron Windsor of Stanwell in Buckinghamshire.
On 26 Dec 1728 George Verney 20th Baron Latimer 12th Baron Willoughby (age 69) died. He was buried at Compton Verney Chapel [Map]. His son Richard Verney 21st Baron Latimer 13th Baron Willoughby (age 35) succeeded 21st Baron Latimer of Corby 1C 1299, 13th Baron Willoughby Broke.
On 26 Dec 1754 Robert Shirley 6th Earl Ferrers (age 31) and Catherine Cotton Countess Ferrers were married.
On 26 Dec 1761 James King 4th Baron Kingston (age 68) died .
On 26 Dec 1766 Henry Conyngham 1st Marquess Conyngham was born to Francis Burton aka Conyngham 2nd Baron Conyngham (age 41) and Elizabeth Clements. He was a twin with his brother Francis Nathaniel Burton.
On 26 Dec 1766 Henrietta Laura Johnstone aka Pulteney 1st Countess Bath was born to William Johnstone aka Pulteney 5th Baronet (age 37) and Frances Pulteney (age 51).
On 26 Dec 1774 Stephen Fox 2nd Baron Holland (age 29) died. His son Henry Vassal-Fox 3rd Baron Holland (age 1) succeeded 3rd Baron Holland in Lincolnshire and 3rd Baron Holland of Foxley in Wiltshire.
On 26 Dec 1775 Charles Manners 4th Duke Rutland (age 21) and Mary Isabella Somerset Duchess Rutland (age 19) were married. She the daughter of Charles Noel Somerset 4th Duke Beaufort and Elizabeth Berekeley Duchess Beaufort (age 62). They were half fourth cousins.
On 26 Dec 1777 Louis Hesse Darmstadt II Grand Duke was born to Louis I Grand Duke of Hesse (age 24).
On 26 Dec 1779 Francis Almeric Spencer 1st Baron Churchill was born to George Spencer 4th Duke Marlborough (age 40) and Caroline Russell Duchess Marlborough (age 36).
On 26 Dec 1786 Colonel William Berkeley 1st Earl Fitzhardinge was born illegitimately to Frederick Augustus Berkeley 5th Earl Berkeley (age 41) and Mary Cole. He a great x 3 grandson of King Charles II of England Scotland and Ireland.
On 26 Dec 1793 Brownlow Cecil 9th Earl Exeter (age 68) died. His nephew Henry Cecil 1st Marquess Exeter (age 39) succeeded 10th Earl Exeter, 11th Baron Burghley. Sarah Hoggins Countess Exeter (age 19) by marriage Countess Exeter.
On 26 Dec 1799 George William Stafford-Jerningham 8th Baron Stafford (age 28) and Frances Henrietta Sulyarde were married. He a great x 3 grandson of King Charles II of England Scotland and Ireland. 
On 26 Dec 1815 Montague Peregrine Bertie 11th Earl Lindsey was born to Albermarle Bertie 9th Earl Lindsey (age 71) and Charlotte Layard Countess Lindsey (age 35).
On 26 Dec 1822 Thomas Coke 2nd Earl of Leicester was born to Thomas Coke 1st Earl of Leicester (age 68) and Anne Amelia Keppel Countess Leicester (age 19).
On 26 Dec 1827 Archibald Douglas 1st Baron Douglas (age 79) died.
On 26 Dec 1847 Dudley Ryder 1st Earl of Harrowby (age 85) died. His son Dudley Ryder 2nd Earl of Harrowby (age 49) succeeded 2nd Earl of Harrowby. Frances Stuart Countess Harrowby Lincolnshire by marriage Countess of Harrowby.
On 26 Dec 1863 Francis Caulfield 2nd Earl Charlemont (age 88) died. His nephew James Molyneux Caulfeild 3rd Earl Charlemont (age 43) succeeded 3rd Earl of Charlemont, 6th Viscount Charlemont in County Armagh, 9th Baron Charlemont. Elizabeth Jane Somerville Countess Charlemont (age 29) by marriage Countess of Charlemont.
On 26 Dec 1904 Henry Molyneux Paget Howard 19th Earl Suffolk 12th Earl Berkshire (age 27) and Margaret Hyde "Daisy" Leiter (age 25) were married. She a wealthy American heiress, one of many who married into English nobilty around the time. He the son of Henry Charles Howard 18th Earl Suffolk 11th Earl Berkshire and Mary Eleanor Coventry Countess Suffolk and Berkshire (age 57).NOTEXT
On 26 Dec 1927 William Henry Holland 1st Baron Rotherham (age 78) died. His son Stuart Holland 2nd Baron Rotherham (age 51) succeeded 2nd Baron Rotherham of Broughton in Lancashire, 2nd Baronet Holland of Queen's Gate in Kensington.
On 26 Dec 1969 William Humble Eric Ward 3rd Earl of Dudley (age 75) died. His son William Ward 4th Earl of Dudley (age 49) succeeded 4th Earl of Dudley of Dudley Castle in Staffordshire 2C 1860, 14th Baron Ward of Birmingham.
