Lord Robert de Percy of Kildale
Robert was born about 1120 in Kildale, Yorkshire, England.  He died about 1165.

 Agnes de Neville
Agnes was born about 1120 in Scotton, Lincolnshire, England .  She died after 1160.

 Lord William de Percy of Kildale
William was born about 1138 in Kildale, Yorkshire, England.  He died before 1204.