William de PERCY
William de was born about 1140 in Kildale, North Ride Yorkshire, England.  He died before September 29th, 1204 in Ormesby, Guisborough, North Ride Yorkshire, England.

 Agnes de FLAMVILLE
Agnes de was born about 1153 in Daly, Yorkshire, England.  She died after 1227.

 Alice PERCY
Alice was born about 1172 in Barwick, Stockton-on-Tees, Durham,. England.