William de Percy
William was born in 1112 in Alnwick, Northumberland, England.  He died at the age of 63 in 1175.

 Alice de Tonbridge de Clare
Alice de Tonbridge was born about 1124 in Tunbridge, Kent, England.  She died after 1148.

 Agnes de Percy
Agnes was born in 1134 in Alnwick, Northumberland, England.  She died before October 13th, 1204 in Petsworth, Sussex, England.

 Emma de Percy
Emma was born about 1146 in Alnwick, Northumberland, England.