William married Sibil De Ewyas about 1210 in Of, Ewyas Harold, Herefordshire, England. Sibil (daughter of Robert De Ewyas, [BARON HEREFORDS and Petronilla Mrs Ewyas) was born in 1178 in EWYAS, Herefordshire, England; died in 1236 in , Ewyas Harold, Herefordshire, England. [Group Sheet] [Family Chart]