Robert De Mortimer
Robert was born before 1252 in Richard's Castle, Herefordshire, England.  He died on April 7th, 1287 in Droitwich, Worcestershire, England.

 Joyce La Zouche
Joyce was born about 1253 in Daventry, Northamptonshire, England.  She died in March 1290.

 Hugh II De Mortimer
Hugh II was born in 1274 in Richard's Castle, Herefordshire, England.  He died at the age of 30 on July 20th, 1304 in Richard's Castle, Herefordshire, England.

 William De Mortimer
William was born about 1276 in King's Nympton, Devonshire, England.  He died on February 28th, 1337 in Richard's Castle, Herefordshire, England.