Father: Piers (Peter) FITZHERBERT , Lord of Blaen Llyfni b: ABT 1163 in Blewleveny Castle, Blaen Llyfni, Brecknockshire, Wales
Mother: Alice FitzRobert de WARKWORTH b: ABT 1192 in Warkworth Castle, Alnwick, Northumberland, England
Marriage 1 William I de ROS , MP, Lord of Helmsley, Sir b: ABT 1196 in Helmsley Castle, Yorkshire North Riding, England
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