Baron De Percy Alan
Baron De Percy was born in 1069.  He died at the age of 66 in December 1135.

 Emma de Gaunt
Emma was born about 1071 in Alost, Flanders, Belgium.  She died in 1135.

 Baron De Percy William
Baron De Percy was born about 1086 in Alnwick, Northumberland, England.  He died about 1133.