Poss. HM George I's 29-Great Grandfather. U.S. President [WASHINGTON]'s 13-Great Grandfather. HRH Charles's 21-Great Grandfather. PM Churchill's 19-Great Grandfather. Lady Diana's 19-Great Grandfather. PM Cameron's 21-Great Grandfather. Gen. Pierpont Hamilton's 20-Great Grandfather. `Osawatomie' Brown's 23-Great Grandfather. Jamie's 21-Great Grandfather.