Edmund Mortimer, 5th Earl of March
Edmund de Mortimer, 5th Earl of March and 7th Earl of Ulster was an English nobleman. A greatgreatgrandson of King Edward III of England, he was heir presumptive to King Richard II of England, his first cousin twice removed, when Richard II was deposed in favour of Henry IV. Edmund Mortimers claim to the crown 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 Mortimer was the last Earl of March of the Mortimer family.
Edmund Mortimer, 5th Earl of March, was born at New Forest, Westmeath, one of his familys Irish estates, onNovember 1391, the son of Roger Mortimer, 4th Earl of March, and Eleanor Holland. He had a younger brother, Roger , and two sisters Anne, who married Richard, Earl of Cambridge, younger son of the Duke of York and Eleanor, who married Sir Edward de Courtenay , and had no issue.
Source: Wikipedia