Roger Mortimer, 4th Earl of March heir presumptive to Richard II of England between 1385 and 1398 (1374–1398) Parents Philippa, 5th Countess of Ulster Edmund Mortimer, 3rd Earl of March Children Roger Mortimer Anne Mortimer, Countess of Cambridge Edmund Mortimer, 5th Earl of March Lady Eleanor de Mortimer Siblings Elizabeth Mortimer Edmund Mortimer Philippa de Mortimer Partners Alianore Holland, Countess of March