Agnes Mortimer, Countess of Pembroke English countess (1317–1368) Parents Roger Mortimer, 1st Earl of March Joan de Geneville, 2nd Baroness Geneville Children John Hastings, 2nd Earl of Pembroke Siblings Edmund Mortimer Margaret Mortimer Maud Mortimer Joan Mortimer Beatrice Mortimer Geoffrey Mortimer John Mortimer Katherine Mortimer, Countess of Warwick Elinor ferch Roger Mortimer Blanche Mortimer Roger Mortimer Isabella Mortimer Partners Laurence Hastings, 1st Earl of Pembroke John de Hakelut