HM George I's 15-Great Half-Uncle. U.S. President [TAYLOR]'s 16-Great Grandfather. HRH Charles's 20-Great Grandfather. PM Churchill's 20-Great Grandfather. Lady Diana's 19-Great Grandfather. PM Cameron's 21-Great Grandfather. Gen. Pierpont Hamilton's 20-Great Grandfather. Poss. Agnes Harris's 15-Great Grandfather. `Osawatomie' Brown's 22-Great Half-Uncle.