William De Percy IV Lord Percy VII Baron Percy
William De Percy IV Lord Percy VII Baron was born in 1185 in Alnwick, Northumberland, England.  He died at the age of 60 in 1245.

 Joan de Briwere
Joan was born in 1187 in Stoke, Devon, England.  Joan is no longer alive.

 Alice De Percy
Alice was born in 1203.

 Ada De Percy
Ada was born in 1210 in Alnwick, Northumberland, England.

 Anastacia De Percy
Anastacia was born in 1218.

 Agnes De Percy
Agnes was born in Alnwick, Northumberland, England.

 Joan De Percy