His grandson was Major William Newton (William5, William', John4, John", Thomas2, Sir John1) was born in 1705 in Westmoreland County. His first wife was Martha Margaret Monroe, an aunt of President James Monroe, and said to have been the daughter of Colonel James Monroe of Pope Creek. His second wife was Elizabeth, daughter of Abram Kenyon, of Virginia, and niece of Lord Kenyon. Major William Newton died in 1789. His will leaves his estates at Carleton, Campbellforth, and Hull, England, to his eldest son, John.

