Matilda de Montgomery (1041-1107) (d. 1082) Parents Mabel de Bellême Roger de Montgomerie, 1st Earl of Shrewsbury Children William, Count of Mortain Emma of Mortain Denise de Mortain Agnes de Mortain Siblings Philip de Montgomery Robert of Bellême, 3rd Earl of Shrewsbury Arnulf de Montgomery Sibyl of Montgomery Hugh of Montgomery, 2nd Earl of Shrewsbury Roger the Poitevin Roger III de Montgomery Partners Robert, Count of Mortain