Poss. HM George I's 31-Great Grandfather. U.S. President [WASHINGTON]'s 15-Great Grandfather. HRH Charles's 22-Great Grandfather. PM Churchill's 20-Great Grandfather. Lady Diana's 20-Great Grandfather. PM Cameron's 21-Great Grandfather. Gen. Pierpont Hamilton's 20-Great Grandfather. `Osawatomie' Brown's 19-Great Grandfather. Jamie's 25-Great Grandfather.