Question: Who is the paternal grandfather of Lady Harriet Mary Montagu?
Sentence (from "George Montagu, 6th Earl of Sandwich"): George John Montagu, 6th Earl of Sandwich (4 February 1773 – 21 May 1818) was the son of John Montagu, 5th Earl of Sandwich and Lady Mary Henrietta Powlett.
Relevant evidence: Yes