HM George I's 20-Great Grandfather. Poss. HRE Ferdinand I's 16-Great Grandfather. HRE Charles VI's 21-Great Grandfather. U.S. President [MONROE]'s 28-Great Grandfather. HM Margrethe II's 27-Great Grandfather. Wm. von Bismarck's 26-Great Grandfather. Poss. `Osawatomie' Brown's 26-Great Grandfather.