William married Maud "of Lancaster" Plantagenet before 1 May 1327 in Papal Dispensati. Maud (daughter of Henry Plantagenet, [EARL OF LANCAST and Maud De Chaworth) was born in 1298 in Of, Lancaster, Lancashire, England; died on 5 May 1377; was buried in Priory, Campsey, Suffolk, England. [Group Sheet] [Family Chart]