Alphonsus de Vere
Alphonsus was born in 1255.

 Jane Foliot
Jane was born before 1295.  Jane is no longer alive.

 John de Vere, 7th Earl of Oxford
John was born about March 13th, 1310 in Oxford, Oxfordshire, England.  He died on January 24th, 1360 in Rheims, Marne, France.

 Joan de Vere