Roger Mortimer, 1st Earl of March English nobleman and rebel (1287-1330) (1287–1330) Parents Margaret Mortimer, Baroness Wigmore Edmund Mortimer, 2nd Baron Mortimer Children Joan Mortimer Elinor ferch Roger Mortimer Beatrice Mortimer Geoffrey Mortimer Isabella Mortimer Margaret Mortimer Blanche Mortimer Maud Mortimer John Mortimer Katherine Mortimer, Countess of Warwick Roger Mortimer Agnes Mortimer, Countess of Pembroke Edmund Mortimer Siblings Maud de Mortimer Edmund Mortimer Elizabeth Mortimer Hugh Mortimer Joan Mortimer Partners Isabella of France Joan de Geneville, 2nd Baroness Geneville