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 .
Edmund of Langley , 1st Duke of York ( 5 June 1341 -- 1 August 1402 ) was a younger son of King Edward III of England and Philippa of Hainault .