Roger de MORTIMER
Roger de was born in 1158.  He died about 1214.

 Isabel de FERRERS
Isabel de was born about 1170 in Tutbury Castle, Tutbury, Staffordshire, England.  She died before May 31st, 1252.

 Ralph de MORTIMER
Ralph de was born about 1190 in Wigmore, Herefordshire, England.  He died on August 6th, 1246 in Wigmore, Herefordshire, England.