Claim: Josiah Quincy II was a descendant of John Hancock and Dorothy Quincy, who emigrated to Massachusetts in 1633.
Evidence: Josiah Quincy II (/ˈkwɪnzi/; February 23, 1744 – April 26, 1775) was an American lawyer and patriot. He was also a distant relative of John Quincy Adams through the sixth President's mother, Abigail Smith Adams. His first cousin once removed was Dorothy Quincy, wife of Governor John Hancock. He was a descendant of Edmund Quincy, who emigrated to Massachusetts in 1633.