Question: Who is the paternal grandfather of Lady Harriet Mary Montagu?
Sentence (from "George Montagu, 6th Earl of Sandwich"): He was styled Viscount Hinchingbrooke from 1790 until in 1814 when, his elder half-brother having died, he inherited the earldom from his father, together with the Hinchingbrooke estate in Huntingdonshire.
Relevant evidence: No