Edmund Mortimer, English nobleman and rebel (d. 1409)
Sir Edmund Mortimer IV (10 December 1376 – January 1409) was an English nobleman and landowner who played a part in the rebellions of the Welsh leader Owain Glyndŵr and of the Percy family against King Henry IV, at the beginning of the 15th century. He perished at the siege of Harlech as part of these conflicts. He was related to many members of the English royal family through his mother, Philippa, Countess of Ulster, who was a granddaughter of King Edward III of England.