William De Percy
William was born in 1193 in Alnwick, Northumberland, England.  He died at the age of 52 in 1245 in Salley Abbey, Craven, Yorkshire, England.

 Joan De Briwere
Joan was born in 1190 in Stoke, Devon, England.  She died at the age of 43 in 1233 in Sandown, Surrey, England.

 Anastasia Percy
Anastasia was born in 1216 in Alnwick, Northumberland, England.  She died at the age of 56 on April 28th, 1272 in Topcliffe, Yorkshire, England.