William married Isabel De Beauchamp about 1261 in Of, Belton, Rutland, England. Isabel (daughter of William De Beauchamp, [EARL OF WARWICK and Maud Fitzgeoffrey) was born about 1252 in Of, Warwick, Warwickshire, England; died about 30 May 1306 in Elmley Castle, Worcestershire, England. [Group Sheet] [Family Chart]