Robert De Mortimer
Robert was born in 1197 in Wigmore, England.  He died at the age of 22 in 1219.

 Margaret De Saye
Margaret was born about 1188 in Richard's Castle, Herefordshire, England.

 Hugh De Mortimer
Hugh was born in 1219 in Richard's Castle, Herefordshire, England.  He died at the age of 55 on November 18th, 1274.