John III FITZALAN
John III was born on September 14th, 1246 in Arundel, Sussex, England.  He died at the age of 25 on March 18th, 1272.

 Isabella MORTIMER
Isabella was born in 1248 in Wigmore, Herefordshire, England.  She died before August 12th, 1274.

 Joan FITZALAN
Joan was born about 1265 in Winchester, Hampshire, England.