Biography of William Beauchamp 1st Baron Abergavenny 1343-1411

On 19th April 1319 Thomas Beauchamp 11th Earl Warwick [aged 6] and Katherine Mortimer Countess Warwick [aged 5] were married. She by marriage Countess Warwick. An arranged marriage although not clear who arranged it or whose ward Thomas Beauchamp 11th Earl Warwick was (his father Guy Beauchamp 10th Earl Warwick had died four years before) - possibly by King Edward II of England [aged 34] as a means of securing the Welsh March. The Beauchamp family established, the Mortimer family aspirational. The marriage took place after Roger Mortimer 1st Earl March [aged 31] had returned from his tenure as Lord Lieutenant of Ireland and before he rebelled against King Edward II of England in opposition to Hugh "Younger" Despencer 1st Baron Despencer [aged 33]. She the daughter of Roger Mortimer 1st Earl March and Joan Geneville Baroness Mortimer 2nd Baroness Geneville [aged 33]. He the son of Guy Beauchamp 10th Earl Warwick and Alice Tosny Countess Warwick [aged 34]. They were half second cousin once removed. She a great x 4 granddaughter of King John of England.

Around 1343 William Beauchamp 1st Baron Abergavenny was born to [his father] Thomas Beauchamp 11th Earl Warwick [aged 29] and [his mother] Katherine Mortimer Countess Warwick [aged 29].

In or before 8th October 1361 [his brother-in-law] John Beauchamp 3rd Baron Beauchamp Somerset [aged 31] and [his sister] Alice Beauchamp Baroness Beauchamp Somerset were married. She by marriage Baroness Beauchamp Somerset. She the daughter of [his father] Thomas Beauchamp 11th Earl Warwick [aged 48] and [his mother] Katherine Mortimer Countess Warwick [aged 47]. They were fourth cousin once removed. She a great x 5 granddaughter of King John of England.

After 8th October 1361, the date of her first husband's death, [his brother-in-law] Matthew Gurney and [his sister] Alice Beauchamp Baroness Beauchamp Somerset were married. She the daughter of [his father] Thomas Beauchamp 11th Earl Warwick [aged 48] and [his mother] Katherine Mortimer Countess Warwick [aged 47].

Before 1363 [his brother-in-law] Roger Clifford 5th Baron Clifford [aged 29] and [his sister] Maud Beauchamp Baroness Clifford [aged 27] were married. She by marriage Baroness de Clifford. She the daughter of [his father] Thomas Beauchamp 11th Earl Warwick [aged 49] and [his mother] Katherine Mortimer Countess Warwick [aged 48]. They were third cousin once removed. He a great x 4 grandson of King John of England. She a great x 5 granddaughter of King John of England.

In 1369 [his mother] Katherine Mortimer Countess Warwick [aged 55] died.

On 13th November 1369 [his father] Thomas Beauchamp 11th Earl Warwick [aged 56] died of plague. His son [his brother] Thomas [aged 31] succeeded 12th Earl Warwick. [his future sister-in-law] Margaret Ferrers Countess Warwick [aged 22] by marriage Countess Warwick.

Before 1374 [his brother] Thomas Beauchamp 12th Earl Warwick [aged 35] and [his sister-in-law] Margaret Ferrers Countess Warwick [aged 26] were married. She by marriage Countess Warwick. He the son of [his father] Thomas Beauchamp 11th Earl Warwick and [his mother] Katherine Mortimer Countess Warwick. They were third cousin twice removed. He a great x 5 grandson of King John of England. She a great x 3 granddaughter of King Edward I of England.

On 12th June 1376 [his brother-in-law] William Ufford 2nd Earl Suffolk [aged 38] and [his sister] Isabella Beauchamp Countess Suffolk were married. She by marriage Countess Suffolk. She the daughter of [his father] Thomas Beauchamp 11th Earl Warwick and [his mother] Katherine Mortimer Countess Warwick. He the son of Robert Ufford 1st Earl Suffolk and Margaret Norwich Countess Suffolk.

In or before 1382 [his brother-in-law] John Strange 5th Baron Strange Blackmere [aged 28] and [his sister] Isabella Beauchamp Countess Suffolk were married. She by marriage Baroness Strange Blackmere. She the daughter of [his father] Thomas Beauchamp 11th Earl Warwick and [his mother] Katherine Mortimer Countess Warwick. They were third cousin once removed. He a great x 5 grandson of King John of England. She a great x 5 granddaughter of King John of England.

On 26th October 1383 [his sister] Alice Beauchamp Baroness Beauchamp Somerset died.

On 23rd July 1392 William Beauchamp 1st Baron Abergavenny [aged 49] was created 1st Baron Abergavenny by writ of summons.

On 23rd July 1392 William Beauchamp 1st Baron Abergavenny [aged 49] and Joan Fitzalan Baroness Bergavenny were married. She by marriage Baroness Abergavenny. She the daughter of Richard Fitzalan 9th Earl of Surrey 4th or 11th Earl of Arundel [aged 46] and Elizabeth Bohun Countess Arundel and Surrey. He the son of Thomas Beauchamp 11th Earl Warwick and Katherine Mortimer Countess Warwick. They were second cousin twice removed. He a great x 5 grandson of King John of England. She a great x 2 granddaughter of King Edward I of England.

In or before 1396 [his son] Richard Beauchamp 1st Earl of Worcester was born to William Beauchamp 1st Baron Abergavenny [aged 52] and [his wife] Joan Fitzalan Baroness Bergavenny. He a great x 3 grandson of King Edward I of England. He married 27th July 1411 his half fourth cousin Isabel Despencer Countess Warwick and Worcester, daughter of Thomas Despencer 1st Earl Gloucester and Constance York Countess Gloucester, and had issue.

On 8th April 1402 [his brother] Thomas Beauchamp 12th Earl Warwick [aged 64] died. His son [his nephew] Richard [aged 20] succeeded 13th Earl Warwick. Elizabeth Berkeley Countess Warwick [aged 16] by marriage Countess Warwick.

In February 1403 [his sister] Maud Beauchamp Baroness Clifford [aged 68] died.

On 8th May 1411 William Beauchamp 1st Baron Abergavenny [aged 68] died at Meaux [Map]. He was buried at Tewkesbury Abbey [Map]. His son Richard [aged 15] succeeded 2nd Baron Abergavenny.

[his daughter] Joan Beauchamp Countess Ormonde was born to William Beauchamp 1st Baron Abergavenny and Joan Fitzalan Baroness Bergavenny. She a great x 3 granddaughter of King Edward I of England. She married 1413 her third cousin James "White Earl" Butler 4th Earl Ormonde, son of James Butler 3rd Earl Ormonde and Anne Welles Countess Ormonde, and had issue.