Robert de Vere
Robert was born on June 24th, 1257 in Hedingham Castle, Essex, England.  He died at the age of 73 on April 17th, 1331 in Oxford, Oxfordshire, England.

 Margaret de Mortimer
Margaret was born about 1262 in Wigmore, Herefordshire, England.  She died about 1296 in Grey Friars, Ipswich, Suffolk, England.

 Ellen de Vere
Ellen was born about 1295.