Edmund of Langley, 1st Duke of York

Edmund of Langley, 1st Duke of York (1341–1402), was the fifth son of Edward III. He campaigned in France, Portugal and Castile before Richard II made him Duke of York in 1385.

In 1370 he joined the Black Prince's campaign that sacked Limoges, and in 1381 he led an unsuccessful expedition to press his brother John of Gaunt's claim to Castile.

He served as Keeper of the Realm during Richard II's Irish expeditions. Left to guard England in 1399, he first resisted and then joined the returning Henry Bolingbroke, and was rewarded under the new Henry IV. Founder of the House of York, Edmund died in 1402.