Lady Mary Montagu (died 1824) (1774–1824) Parents John Montagu, 5th Earl of Sandwich Lady Mary Henrietta Powlett Children Henry Upton, 2nd Viscount Templetown Arthur Upton Edward John Upton Mary Wilhelmina Upton George Upton, 3rd Viscount Templetown Siblings William Augustus Montagu Henrietta Susannah Montagu Caroline Montagu Francis Charles Montagu Harriet Montagu George Montagu, 6th Earl of Sandwich John George Montagu Partners John Upton, 1st Viscount Templetown
