HM George I's 14-Great Aunt. HRE Ferdinand I's 10-Great Aunt. HRE Charles VI's 14-Great Aunt. U.S. President [T. ROOSEVELT]'s 21-Great Aunt. PM Churchill's 23-Great Grandmother. Lady Diana's 25-Great Grandmother. HRH Albert II's 21-Great Grandmother. Louis XVII's 17-Great Grandmother.