Geoffrey De Percy
Geoffrey was born in 1020 in Perci-En-Auge, Normandy, France.

 William De Percy
William was born about 1040 in Perci-En-Auge, Normandy, France.  He died in 1096 in Mt Joy, Jerusalem, Palestine.  He was buried in Mt Joy, Jerusalem, Palestine.

 Serlo De Percy
Serlo was born about 1045.