Margaret de Ros Peerage person ID=176189 (b. 1366) Parents Thomas de Ros, 4th Baron de Ros Beatrice de Stafford Children John Grey Eleanor Grey Margaret Grey, Lady Bonville Siblings John de Ros, 5th Baron de Ros Elizabeth de Ros William de Ros, 6th Baron de Ros Thomas de Ros Robert de Ros Partners Reginald Grey, 3rd Baron Grey de Ruthyn