William de Beauchamp, 9th Earl of Warwick English nobleman and soldier, Earl of Warwick (1237–1298) Parents Isabel de Mauduit William de Beauchamp Children Sarah de Beauchamp Guy de Beauchamp, 10th Earl of Warwick unknown daughter de Beauchamp Isabella de Beauchamp unknown daughter de Beauchamp unknown daughter de Beauchamp Siblings Sir Walter de Beauchamp Sarah de Beauchamp Isabel le Beauchamp John Beauchamp Joan de Beauchamp Partners Maud FitzJohn, Countess of Warwick
