11 Dec is in December.
On 11 Dec 1282 an English force including John Giffard 1st Baron Giffard Brimpsfield (age 50), Gruffydd ap Gwenwynwyn Mathrafal Prince Powys Wenwynwyn (age 71) and Owen de la Pole Mathrafal 1st Lord Powis (age 25) defeated a Welsh force at Builth Wells [Map] during the Battle of Orewin Bridge. The Welsh leader Llewellyn "Last" Aberffraw (age 49) was killed effectively bringing to an end the independence of Wales.
On 11 Dec 1443 John Cornwall 1st Baron Fanhope 1st Baron Milbroke (age 79) died at Ampthill Castle [Map]. He was buried at Blackfriars Preachers Ludgate.
On 11 Dec 1620 the Maylower landed at Plymouth Rock Massachusetts and went to found Plymouth Colony. The first documented reference to the landing at Plyouth Rock was in 1741.
On 11 Dec 1661 Roger Palmer 1st Earl Castlemaine (age 27) was created 1st Earl Castlemaine, 1st Baron Limerick by King Charles II of England Scotland and Ireland (age 31) to Roger Palmer 1st Earl Castlemaine (age 27) in gratitude for allowing his wife Barbara Villiers 1st Duchess of Cleveland (age 21) to become the King's mistress. Barbara Villiers 1st Duchess of Cleveland (age 21) by marriage Countess Castlemaine.
Pepy's Diary. 11 Dec 1666. Thence, having promised to write every month to her, we home, and I to my office, while my wife to get things together for supper. Dispatching my business at the office. Anon come our guests, old Mr. Batelier, and his son and daughter, Mercer, which was all our company. We had a good venison pasty and other good cheer, and as merry as in so good, innocent, and understanding company I could be. He is much troubled that wines, laden by him in France before the late proclamation was out, cannot now be brought into England, which is so much to his and other merchants' loss. We sat long at supper and then to talk, and so late parted and so to bed. This day the Poll Bill was to be passed, and great endeavours used to take away the Proviso.
On 11 Dec 1669 Philip Herbert 5th Earl Pembroke 2nd Earl Montgomery (age 48) died. His son William Herbert 6th Earl Pembroke 3rd Earl Montgomery (age 28) succeeded 6th Earl Pembroke 10C 1551, 3rd Earl Montgomery.
On 11 Dec 1686 Louis "Le Grand Condé" Bourbon Condé II Prince Condé (age 65) died. His son Henri Jules Bourbon Condé Prince Condé (age 43) succeeded Prince Condé.
On 11 Dec 1718 Charles XII King of Sweden (age 36) was killed whilst in the trenches around Fredriksten which he was besieging. He was struck in the head by a projectile and killed. The shot struck the left side of his skull and exited from the right. It isn't clear who fired the shot. His sister Ulrika Eleonora Palatinate Zweibrücken Queen Consort Sweden (age 30) succeeded Queen Sweden. She effectively usurped her nephew Charles Frederick Duke of Holstein Gottorp (age 18) whose parents were both dead.
On 11 Dec 1718 John Germain 1st Baronet (age 68) died. Baronet Germain of Westminster extinct. His wife survived him until 1769 when she left his and her etates to George Sackville aka Germain 1st Viscount Sackville (age 2) who adopted the surname Germain.
On 11 Dec 1743 Frederick V King Denmark and Norway (age 20) and Louise Hanover Queen Consort Denmark and Norway (age 18) were married. She by marriage Queen Consort Denmark and Norway. She the daughter of King George II of Great Britain and Ireland (age 60) and Caroline Hohenzollern Queen Consort England. He the son of Christian VI King Denmark and Norway (age 44). They were third cousin once removed.
On 11 Dec 1781 Francis Dashwood 11th Baron Despencer (age 73) died. Baron Despencer 4C 1357 abeyant. His brother John Dashwood-King 3rd Baronet (age 65) succeeded 3rd Baronet Dashwood of West Wycombe in Buckinghamshire.
On 11 Dec 1808 Thomas Henry Foley 4th Baron Foley was born to Thomas Foley 3rd Baron Foley (age 27) and Cecilia Olivia Geraldine Fitzgerald Baroness Foley (age 22).
On 11 Dec 1813 George Gordon 5th Duke Gordon (age 43) and Elizabeth Brodie Duchess Gordon (age 19) were married. She brought £100,000 to the marriage and inherited more then £100,000 when her father died. The difference in their ages was 24 years. He the son of Alexander Gordon 4th Duke Gordon (age 70).
Susan Gordon Countess of Westmoreland: In 1752 she was born to Cosmo George Gordon 3rd Duke Gordon (age 31) and Catherine Gordon Duchess Gordon (age 34). On 28 May 1767 John Fane 9th Earl of Westmoreland (age 39) and Susan Gordon Countess of Westmoreland (age 15) were married. The difference in their ages was 23 years. She the daughter of Cosmo George Gordon 3rd Duke Gordon and Catherine Gordon Duchess Gordon (age 49). He the son of Thomas Fane 8th Earl of Westmoreland (age 66) and Elizabeth Swymmer Countess Westmoreland.
On 11 Dec 1824 George Richard St John 4th Viscount St John 3rd Viscount Bolingbroke (age 63) died at Pisa. His son Henry St John 4th Viscount Bolingbroke 5th Viscount St John (age 38) succeeded 5th Viscount St John, 4th Viscount Bolingbroke, 8th Baronet St John Lydiard Tregoze in Wiltshire. Maria St John-Mildmay Viscountess Bolingbroke and St John (age 34) by marriage Viscountess St John, Viscountess Bolingbroke.
On 11 Dec 1899 Augustus Paulet 15th Marquess of Winchester (age 41) was killed in action at Magersfontein, South Africa in a battle where the defending Boer force defeated the advancing British forces. His brother Henry Paulet 16th Marquess of Winchester (age 37) succeeded 16th Marquess Winchester, 16th Earl Wiltshire, 16th Baron St John 1C 1539.
On 11 Dec 1912 Arthur Mountifort Longfield Ponsonby 11th Earl Bessborough was born to Cyril Myles Ponsonby (age 31).
On 11 Dec 1936 King Edward VIII of the United Kingdom (age 42) abdicated VIII King United Kingdom. King George VI of the United Kingdom (age 40) succeeded VI King United Kingdom. Duke York 7C 1920 merged with the Crown.
On 11 Dec 1944 Lieutenant-Colonel William Orde-Powlett 5th Baron Bolton (age 75) died. His son Nigel Amyas Orde-Powlett 6th Baron Bolton (age 44) succeeded 6th Baron Bolton of Bolton in Yorkshire.
On 11 Dec 1947 George Lane-Fox 1st Baron Bingley (age 76) died.