William II De Fiennes
William II was born in 1245 in Wendover, Buckinghamshire, England.  He died at the age of 57 on July 11th, 1302 in Courtral, Flandre, Occidental, Flanders.

 Blanche De Brienne
Blanche was born in 1245 in Courtrain, Mynn, France.  She died at the age of 57 in 1302.

 Margaret De Fiennes
Margaret was born in 1262 in Fiennes, Pas-De-Calais, Calais.  She died at the age of 72 on February 7th, 1334 in Wigmore, Herefordshire, England.

 Joan De Fiennes
Joan was born in 1272 in Fiennes, Pas-De-Calais, Calais.

 John De Fiennes
John was born about 1278 in Fiennes, Pas-De-Calais, Calais.