Question: Who is Richard De Vere, 11Th Earl Of Oxford's paternal grandfather?
Sentence (from "Aubrey de Vere, 10th Earl of Oxford"): Aubrey de Vere's third brother, Thomas, succeeded his father as 8th Earl of Oxford, and was in turn succeeded by his only son, Robert de Vere, 9th Earl of Oxford, who died in 1392 without issue, leaving Aubrey de Vere to inherit the earldom.
Relevant evidence: No