Question: Who is John De Vere, 13Th Earl Of Oxford's paternal grandmother?
Sentence (from "John de Vere, 12th Earl of Oxford"): John de Vere, 12th Earl of Oxford (23 April 1408 – 26 February 1462), was the son of Richard de Vere, 11th Earl of Oxford (1385?–15 February 1417), and his second wife, Alice Sergeaux (1386–1452).
Relevant evidence: Yes