Everard III de Mortagne
Everard III de was born about 1135 in Mortagne, Pas de Calais, Normandy, France.  He died in July 1189.

 Gertrude de Montagu
Gertrude de was born about 1140 in Montaigu, Aisne, France.  Gertrude de is no longer alive.

 Baudoin IV de Tournai de Mortagne
Baudoin IV de Tournai de was born in 1160 in Mortagne, Pas de Calais, Normandy, France.  He died at the age of 53 in 1213.