William II of Fiennes
William II of Fiennes was born about 1245 in Wendover, Buck, England..  He died  due to battle casualty on July 11th, 1302 in Coutrain, Flanders battle.

 Blanche Brienne
Blanche was born about 1252 in Courtrain, Mayenne, France.  She died in 1302.

 Margaret Fiennes
Margaret was born about 1270 in Picardy, Normandy, France.