Robert of Bellême, 3rd Earl of Shrewsbury English noble (b. 1052) Parents Mabel de Bellême Roger de Montgomerie, 1st Earl of Shrewsbury Children William III, Count of Ponthieu Siblings Roger the Poitevin Hugh of Montgomery, 2nd Earl of Shrewsbury Arnulf de Montgomery Philip de Montgomery Sibyl of Montgomery Matilda de Montgomery Roger III de Montgomery Partners Agnes, Countess of Ponthieu