Edmund Mortimer, 5th Earl of March

Edmund Mortimer
Earl of March and of Ulster
SuccessorRichard, 3rd Duke of York
Born6 November 1391
New Forest, Westmeath
Died18 January 1425 (aged 33)
Trim Castle
BuriedClare Priory, Suffolk
FamilyMortimer
SpouseAnne Stafford (m. 1415)
FatherRoger Mortimer, 4th Earl of March
MotherEleanor Holland
Arms of Mortimer: Barry or and azure, on a chief of the first two pallets between two base esquires of the second over all an inescutcheon argent

Edmund Mortimer, 5th Earl of March, 7th Earl of Ulster (6 November 1391 – 18 January 1425), was an English nobleman and a potential claimant to the throne of England. A great-great-grandson of King Edward III of England, he was heir presumptive to King Richard II of England (both his paternal first cousin twice removed and maternal half grand-uncle) when the latter was deposed in favour of Henry IV. Edmund Mortimer's claim to the throne was the basis of rebellions and plots against Henry IV and his son Henry V, and was later taken up by the House of York in the Wars of the Roses, though Mortimer himself was an important and loyal vassal of Henry V and Henry VI. Edmund was the last Earl of March of the Mortimer family.