Agnes of Essex Countess of Oxford (b. 1151) Parents Cecily Henry d'Essex Children Alice de Vere Ralph de Vere Robert de Vere, 3rd Earl of Oxford Sarah de Vere Aubrey de Vere, 2nd Earl of Oxford William de Vere Siblings Hugh de Essex Henry de Essex Robert de Essex Alice de Essex Partners Aubrey de Vere, 1st Earl of Oxford