Lady Mary Montagu Peerage person ID=460027 (d. 1743) Parents George Montagu, 1st Earl of Halifax Lady Mary Lumley Children John Osborn Sir George Osborn, 4th Baronet Siblings Elizabeth Montague Lady Lucy Montague George Montagu-Dunk, 2nd Earl of Halifax Lady Frances Montagu Barbara Montagu Partners Sir Danvers Osborn, 3rd Baronet