William De Percy
William was born in 1092 in Alnwick, Northumberland, England.

 Alice De Ros
Alice was born about 1094 in Helmsley Castle, Holderness, Yorkshire, England.

 William De Percy
William was born in 1112 in Alnwick, Northumberland, England.  He died at the age of 56 in 1168 in Topcliffe, Yorkshire, England.

 Robert De Percy
Robert was born about 1114 in North Riding Yorkshire, England.

 Alan De Percy
Alan was born about 1116 in North Riding Yorkshire, England.

 Richard De Percy
Richard was born about 1118 in North Riding Yorkshire, England.