Aubrey de Vere III, 1st Earl of Oxford
Aubrey was born about 1110 in Essex, England.  He died on December 26th, 1194.

 Agnes de Essex
Agnes was born in 1141.

 Robert de Vere 3rd Earl of Oxford
Robert was born in 1160 in Hatfield, Broad Oaks, Essex, England.  He died at the age of 61 on October 25th, 1221 in Essex, England.