Edmund of Langley, 1st Duke of York

Edmund of Langley
Duke of York
Edmund of Langley before King Ferdinand I of Portugal, from Jean de Wavrin's Chronique d'Angleterre
Born	5 June 1341 Kings Langley, Hertfordshire, England
Died	1 August 1402 (aged 61) Epworth, Lincolnshire, England
Burial	King's Langley Priory (1402–1575) All Saints' Church, Kings Langley (since 1575)
Spouse	Isabella of Castile ​ ​ (m. 1372; died 1392)​ Joan Holland ​ (m. 1393)​
Issue	Edward, 2nd Duke of York Constance, Countess of Gloucester Richard, 3rd Earl of Cambridge
House	Plantagenet (by birth) York (founder)
Father	Edward III, King of England
Mother	Philippa of Hainault

Edmund of Langley, 1st Duke of York (5 June 1341 – 1 August 1402) was the fourth surviving son of King Edward III of England and Philippa of Hainault. Like many medieval English princes, Edmund gained his nickname from his birthplace: Kings Langley Palace in Hertfordshire. He was the founder of the House of York, but it was through the marriage of his younger son, Richard of Conisburgh, 3rd Earl of Cambridge, to Anne de Mortimer, great-granddaughter of Edmund's elder brother Lionel of Antwerp, 1st Duke of Clarence, that the House of York made its claim to the English throne in the Wars of the Roses. The other party in the Wars of the Roses, the incumbent House of Lancaster, was formed from descendants of Edmund's elder brother John of Gaunt, 1st Duke of Lancaster, Edward III's third son.