Isabel le Despenser, Countess of Worcester and Warwick (26 July 1400 – 1439) was the posthumous daughter and eventually the sole heiress of Thomas le Despenser

Thomas le Despenser, 1st Earl of Gloucester

Thomas le Despenser, 1st Earl of Gloucester KG was the son of Edward le Despenser, 1st Baron le Despencer, whom he succeeded in 1375.-Royal intrigues:...

 and his wife, Constance of York

Constance of York

Constance of York, Countess of Gloucester was the only daughter of Edmund of Langley, 1st Duke of York and his wife Isabella of Castile, daughter of Pedro of Castile and Maria de Padilla. On about 7 November 1379, Constance married Thomas le Despenser, 1st Earl of Gloucester , who was eventually...

. She was born six months after her father had been beheaded for plotting against King Henry IV of England

Henry IV of England

Henry IV was King of England and Lord of Ireland . He was the ninth King of England of the House of Plantagenet and also asserted his grandfather's claim to the title King of France. He was born at Bolingbroke Castle in Lincolnshire, hence his other name, Henry Bolingbroke...

.

Isabel married Richard de Beauchamp, 1st Earl of Worcester

Richard Beauchamp, 1st Earl of Worcester

Richard de Beauchamp, 1st Earl of Worcester, KB was an English peer.The only son of the William de Beauchamp, 1st Baron Bergavenny, he succeeded as 2nd Baron Bergavenny upon the death of his father....

 who died in 1422 at the siege of Meaux. They had a daughter, Elizabeth de Beauchamp, Lady of Abergavenny

Elizabeth de Beauchamp, Lady of Abergavenny

Elizabeth de Beauchamp was the only child and heiress of Richard de Beauchamp, Baron Abergavenny and 1st Earl of Worcester, by Isabel, daughter of Thomas le Despencer, Earl of Gloucester by Constance of York, granddaughter of Edward III.She inherited her father's estates upon his death and...

, born 1415.

Isabel married again, to Richard de Beauchamp, 13th Earl of Warwick

Richard de Beauchamp, 13th Earl of Warwick

Richard de Beauchamp, 13th Earl of Warwick, Count of Aumale, KG was an English medieval nobleman and military commander.-Early Life:...

 (her 1st husband's cousin), by whom she had two children:

• Henry
  Henry de Beauchamp, 1st Duke of Warwick
  Henry de Beauchamp, 1st Duke of Warwick was an English nobleman.He was the son of Richard de Beauchamp, 13th Earl of Warwick and Isabel le Despenser...
  
  , who succeeded his father as Earl of Warwick
  Earl of Warwick
  Earl of Warwick is a title that has been created four times in British history and is one of the most prestigious titles in the peerages of the British Isles.-1088 creation:...
  
  , and later became Duke of Warwick;
• Anne
  Anne Neville, 16th Countess of Warwick
  Anne de Beauchamp, 16th Countess of Warwick was the daughter of Richard de Beauchamp, 13th Earl of Warwick, and his second wife Isabel le Despenser. Isabel was a daughter of Thomas le Despenser Anne de Beauchamp, 16th Countess of Warwick (13 July 1426 – 20 September 1492) was the daughter of...
  
  , who became 16th Countess of Warwick, following the death of her brother, and his daughter and her namesake. Anne married Richard Neville, the Kingmaker
  Richard Neville, 16th Earl of Warwick
  Richard Neville KG, jure uxoris 16th Earl of Warwick and suo jure 6th Earl of Salisbury and 8th and 5th Baron Montacute , known as Warwick the Kingmaker, was an English nobleman, administrator, and military commander...
  
  , eldest son of Richard Neville, 5th Earl of Salisbury
  Richard Neville, 5th Earl of Salisbury
  Richard Neville, jure uxoris 5th Earl of Salisbury and 7th and 4th Baron Montacute, KG, PC was a Yorkist leader during the early parts of the Wars of the Roses.-Background:...
  
  .

Ancestry