HM George I's 20-Great Grandfather. HRE Ferdinand I's 17-Great Grandfather. U.S. President [B, HARRISON]'s 26-Great Grandfather. HM Margrethe II's 27-Great Grandfather. Wm. von Bismarck's 25-Great Grandfather. `Red Baron' Richthofen's 26-Great Grandfather. Poss. Agnes Harris's 20-Great Grandfather. `Osawatomie' Brown's 36-Great Grandfather.