HM George I's 18-Great Grandmother. HRE Ferdinand I's 15-Great Grandmother. U.S. President [B, HARRISON]'s 24-Great Grandmother. PM Churchill's 28-Great Grandmother. HM Margrethe II's 25-Great Grandmother. Wm. von Bismarck's 23-Great Grandmother. Poss. Agnes Harris's 18-Great Grandmother. `Osawatomie' Brown's 34-Great Grandmother.