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, 10th Earl of Oxford (c. 1338 – 15 February 1400) was the third son of John de Vere, 7th Earl of Oxford and Maud de Badlesmere, daughter of Bartholomew de Badlesmere, 1st Lord Badlesmere.
Relevant evidence: Yes