Question: Who is Henry Beaufort, 2Nd Earl Of Somerset's maternal grandfather?
Sentence (from "Henry Beaufort, 2nd Earl of Somerset"): Henry Beaufort, 2nd Earl of Somerset ("probably" 26 November 1401 – 25 November 1418) was the eldest son of John Beaufort, 1st Earl of Somerset, and the grandson of John of Gaunt,
Relevant evidence: No