HM George I's 17-Great Grandfather. HRE Ferdinand I's 12-Great Grandfather. U.S. President [WASHINGTON]'s 19-Great Grandfather. PM Churchill's 23-Great Grandfather. HM Margrethe II's 25-Great Grandfather. Gen. Pierpont Hamilton's 23-Great Grandfather. Poss. Agnes Harris's 21-Great Grandfather. `Osawatomie' Brown's 22-Great Grandfather.