When General Sir William Johnson, Superintendent for Northern Indian Affairs, visited Canajoharie, he always stayed at the house of his friend, Molly's stepfather Brant "Kanagaradunkwa". Shortly after Johnson's first common-law wife, Catherine Weisenberg, died, Brant moved into Fort Johnson. Johnson and Molly Brant became intimate; in September 1759, she gave birth to his son, Peter Warren Johnson, named for Sir William's early patron and uncle, Admiral Sir Peter Warren. Brant lived with Johnson at Fort Johnson, and then his personal residence of Johnson Hall after 1763, when the British had defeated the French in the Seven Years' War. (It was known on the North American front as the French and Indian War. The Iroquois had mostly allied with the British during this war.)