Poss. HM George I's 17-Great Grandmother. Poss. HRE Ferdinand I's 13-Great Aunt. Poss. HRE Charles VI's 17-Great Grandmother. Poss. U.S. President [WASHINGTON]'s 20-Great Aunt. HRH Charles's 25-Great Grandmother. HRH Albert II's 26-Great Grandmother. Louis XVII's 21-Great Grandmother. Poss. `Osawatomie' Brown's 24-Great Aunt.