William de Beauchamp, who inherited not only the feudal barony of Elmly from his father, but had previously derived from his mother the Earldom of Warwick and the barony of Hameslape from the de Maudits. He married Maud, one of the daughters and co-heirs of Richard FitzJohn, son of John FitzGeoffrey, Chief Justice of Ireland, and had Guy and five daughters: Isabel, Maud, Margaret, Anne and Amy. He died 1298 and was first Earl of Warwick of the Beauchamp family, having previous to his mother's death used the style and title of Earl of Warwick.