UNKNOWN DE MORTIMER
UNKNOWN is no longer alive.

 Catherine DE MORTIMER
Catherine was born about 1300 in Wigmore, Herefordshire.  She died before September 6th, 1369.  She was buried in St. Mary's, Warwick.

 Margaret DE MORTIMER
Margaret was born in 1308.  She died at the age of 29 on May 5th, 1337.