Sister is in Parents And Siblings.
In 1203 Arthur Plantagenet 3rd Duke Brittany (age 16) was murdered at Rouen [Map]. His sister Alix Thouars Duchess of Brittany (age 1) succeeded 5th Countess Richmond. Her half-sister Eleanor "Fair Maid of Britanny" 4th Countess of Richmond (age 19), who was imprisoned from 1202 to her death, also used the title Countess of Richmond.
In 1262 Baldwin Redvers 7th Earl Devon (age 25) died. His sister Isabella Redvers 8th Countess Devon and Albemarle aka Aumale (age 24) succeeded 8th Countess Devon.
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 10 Apr 1362 Maud Plantagenet Duchess Lower Bavaria (age 23) died. Her sister Blanche Plantagenet Duchess Lancaster (age 17) succeeded 6th Countess of Leicester. John of Gaunt 1st Duke Lancaster (age 22) by marriage Earl of Leicester 2C 1265 adding a fourth Earldom to the ones he already held: Earl Richmond 5C 1342, Earl Lancaster and Earl Derby 2C 1337.
In 1375 Alice Boteler (age 35) died at Wem. Her sister Elizabeth Boteler Baroness Ferrers Wem (age 30) abeyance terminated 4th Baroness Wem and Oversley. Robert Ferrers Baron Wem and Oversley (age 34) by marriage Baron Wem and Oversley. Some sources suggest her husband was created Baron Ferrers of Wem and Oversley in this own right. Since his son Robert Ferrers (age 2) didn't succeed to a title when his father died it appears Robert Ferrers was summoned to Parliament in right of his wife ie jure uxoris, rather than being created a Baron in his won right.
On 23 Aug 1383 Elizabeth Strange Countess Nottingham (age 21) died. Her sister Ankaret Strange 7th Baroness Strange Blackmere, Baroness Talbot (age 22) succeeded 7th Baroness Strange Blackmere. Richard Talbot 7th Baron Strange Blackmere 4th Baron Talbot (age 22) by marriage Baron Strange Blackmere 1C 1309.
On either 05 Aug 1388 or 19 Aug 1388 a Scottish army commanded by John Swinton defeated an English army commanded by Henry "Hotspur" Percy (age 24) during the Battle of Otterburn at Otterburn [Map]. Henry "Hotspur" Percy (age 24) and his brother Ralph Percy (age 29) were captured as was Matthew Redman (age 60). The English suffered 1000 killed, 2000 captured. The Scottish 100 killed, 200 captured.
John Dunbar 1st Earl Moray (age 46) fought.
On 13 Nov 1396 John Devereux 2nd Baron Devereux (age 18) died. His sister Joan Devereux 3rd Baroness Devereux Baroness Burnell (age 17) succeeded 3rd Baroness Devereux.
On 19 Mar 1470 Robert Welles 8th Baron Willoughby 8th Baron Welles was beheaded at Doncaster [Map]. He was buried at Whitefriars Doncaster [Map]. His sister Joan Welles 9th Baroness Willoughby Eresby succeeded 9th Baroness Willoughby de Eresby. Richard Hastings Baron Willoughby (age 37) by marriage Baron Willoughby de Eresby. He, Hastings, a favourite of King Edward IV of England (age 27), younger brother of Edward's (age 27) great friend William Hastings 1st Baron Hastings (age 39).
On 20 Mar 1470 the army of William Berkeley 1st Marquess Berkeley (age 44) including Maurice Berkeley 3rd Baron Berkeley (age 35) defeated the army of Thomas Talbot 2nd Viscount Lisle (age 21) at Nibley Green Berkeley, Gloucestershire.
Ostensibly a battle of the Wars of the Roses it may also be considered a settling of the dispute over the ownership of Berkeley Castle [Map] which has passed with the Baron Berkeley Feudal to William Berkeley 1st Marquess Berkeley (age 44) rather than with Baron Berkeley 1C 1295 which was abeyant, and of which Thomas Talbot 2nd Viscount Lisle (age 21) was a potential heir.
Before 10 Feb 1474 Margaret Deincourt Baroness Cromwell (age 68) died. Her sister Alice Deincourt 6th Baroness Deincourt, Baroness Lovel and Baroness Sudeley (age 69) abeyance terminated 6th Baroness Deincourt.
On 10 Mar 1490 Joan Stanhope died. Her sister Maud Stanhope 4th Baroness Cromwell Baroness Willoughby Eresby abeyance terminated 4th Baroness Cromwell.
On 26 Jun 1542 Robert Tailboys 3rd Baron Tailboys 11th Baron Kyme (age 14) died. His sister Elizabeth Tailboys Countess Warwick (age 20) succeeded 4th Baroness Tailboys of Kyme, def jure 12th Baroness Kyme.
On 17 Nov 1558 Queen Mary I of England and Ireland (age 42) died at St James's Palace [Map]. Her sister Queen Elizabeth I of England and Ireland (age 25) succeeded I Queen England. William Brooke 10th Baron Cobham (age 31) was deputed with informing Philip "The Prudent" II King Spain (age 31).
Thomas Wendy (age 58) attended the Queen as physician; the third monarch's death he attended.
On 25 Dec 1594 Gregory Fiennes 10th Baron Dacre Gilsland (age 55) died. He was buried at Chelsea Old Church. His sister Margaret Fiennes 11th Baroness Dacre Gilsland (age 53) succeeded 11th Baroness Dacre Gilsland. Samson Lennard Baron Dacre Gilsland (age 50) by marriage Baron Dacre Gilsland 1C 1321.
On 30 Sep 1628 Fulk Greville 13th Baron Latimer 5th Baron Willoughby 1st Baron Brooke (age 73) was killed at his house in London by servant Ralph Haywood who believed that he had been cheated in his master's will; Haywood then turned the knife on himself. He was buried at St Mary's Church, Warwick [Map]. His sister Margaret Greville 14th Baroness Latimer 6th Baroness Willoughby Broke (age 67) de jure 14th Baroness Latimer of Corby, 6th Baroness Willoughby Broke. Richard Verney 14th Baron Latimer 6th Baron Willoughby (age 65) by marriage Baron Latimer of Corby 1C 1299, Baron Willoughby Broke. His first cousin once removed Robert Greville 2nd Baron Brooke (age 21) succeeded 2nd Baron Brooke of Beauchamps Court in Warwickshire.
On 10 Aug 1660 Esmé Stewart 2nd Duke Richmond 5th Duke Lennox (age 11) died of smallpox at Paris [Map]. He was buried in on 04 Sep 1660 in the Richmond Vault, Westminster Abbey. His first cousin Charles Stewart 6th Duke Lennox 3rd Duke Richmond (age 21) succeeded 6th Duke Lennox, 3rd Duke Richmond 2C 1641. 4th Earl March 3C 1619. Elizabeth Rogers Duchess Richmond by marriage Duchess Richmond. His sister Mary Stewart Countess Arran (age 9) succeeded 5th Baroness Clifton of Leighton Bromswold in Huntingdonshire.
In Dec 1672 Charles Stewart 6th Duke Lennox 3rd Duke Richmond (age 33) drowned at Elsinor. Duke Lennox, Duke Richmond 2C 1641, Earl March 3C 1619, Earl Lichfield 1C 1645, Baron Stuart extinct. His sister Katherine Stewart (age 32) succeeded 7th Baroness Clifton of Leighton Bromswold in Huntingdonshire.
In Feb 1713 Edward Hyde 9th Baron Clifton died. His sister Theodosia Hyde (age 17) succeeded 10th Baroness Clifton of Leighton Bromswold in Huntingdonshire.
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.
In 1733 Pedro Manuel Nuño Colón 8th Duke Veragua died. His sister Catalina Ventura Colón Duchess Berwick 9th Duchess Veragua (age 42) succeeded 9th Duchess Veragua.
On 14 Sep 1749 Field Marshal Richard Temple 1st Viscount Cobham (age 73) died without surviving issue. His sister Hester Temple 1st Countess Temple (age 59) succeeded 2nd Viscountess Cobham by special remainder. Baron Cobham 6C 1714 extinct. His second cousin once removed William Temple 5th Baronet (age 55) succeeded 5th Baronet Temple of Stowe.
On 08 Jul 1779 Robert Bertie 4th Duke Ancaster and Kesteven (age 22) died of scarlet fever unmarried at Grimsthorpe, South Kesteven. His uncle Brownlow Bertie 5th Duke Ancaster and Kesteven (age 50) succeeded 5th Duke Ancaster and Kesteven, 5th Marquess Lindsay, 8th Earl Lindsey. His sister Priscilla Barbara Elizabeth Bertie 21st Baroness Willoughby Eresby (age 18) succeeded 21st Baroness Willoughby de Eresby.
On 02 Oct 1789 Francis Hastings 10th Earl Huntingdon (age 60) died unmarried at the home of his nephew Francis Rawdon-Hastings 1st Marquess Hastings (age 34). His fifth cousin once removed Theophilus Henry Hastings 11th Earl Huntingdon (age 60) de jure 11th Earl Huntingdon 7C 1529 although he wasn't aware of the fact. His sister Elizabeth Hastings Countess Moira (age 58) succeeded 16th Baroness Botreaux 1368, 15th Baroness Hungerford, 13th Baroness Moleyns and 13th Baroness Hastings
On 04 Feb 1794 Charles Trevor Roper 18th Baron Dacre Gilsland (age 49) died. His sister Gertrude Trevor Roper 19th Baroness Dacre Gilsland (age 43) succeeded 19th Baroness Dacre Gilsland. Thomas Brand Baron Dacre (age 44) by marriage Baron Dacre Gilsland 1C 1321 albeit for seventeen days only since he died on 21 Feb 1794.
On 09 Mar 1821 Wilbrahim Tollemache 6th Earl Dysart (age 81) died. His sister Louisa Tollemache 7th Countess Dysart (age 75) succeeded 7th Countess Dysart. Baronet Talmash of Helmingham in Suffolk extinct. Her grandson William Manners aka Tollemache 1st Baronet (age 54) assumed the name Tollemache.
On 26 Aug 1870 Almeric Drummond Willoughby 23rd Baron Willoughby 3rd Baron Gwydyr (age 49) died. He was buried at Church of St Michael and All Angels Edenham [Map]. His sister Clementina Drummond Willoughby 24th Baroness Willoughby Eresby Baroness Aveland (age 60) succeeded 24th Baroness Willoughby de Eresby. Gilbert John Heathcote 1st Baron Aveland by marriage Baron Willoughby de Eresby.
On 22 Jul 1969 John Kemeys-Tynte 9th Baron Wharton (age 61) died. His sister Elisabeth Kemeys-Tynte 10th Baroness Wharton 19067 (age 63) succeeded 10th Baroness Wharton.
On 17 May 2012 June Wendy Pelham (age 87) died. Her sister Diana Mary Pelham 15th Baroness Conyers 9th Fauconberg (age 91) abeyance terminated 16th Baroness Conyers, 9th Baroness Fauconberg