HM George I's 24-Great Grandmother. Poss. HRE Ferdinand I's 22-Great Grandmother. Poss. HRE Charles VI's 25-Great Grandmother. U.S. President [B, HARRISON]'s 27-Great Grandmother. Poss. PM Churchill's 24-Great Grandmother. Poss. Agnes Harris's 21-Great Grandmother. Poss. `Osawatomie' Brown's 28-Great Grandmother.