HM George I's 9-Great Aunt. HRE Charles VI's 11-Great Aunt. PM Churchill's 17-Great Aunt. Lady Diana's 18-Great Aunt. PM Cameron's 18-Great Aunt. HRH Albert II's 18-Great Aunt. HM Margrethe II's 16-Great Aunt. `Red Baron' Richthofen's 14-Great Aunt. HRH Catharina-Amalia's 18-Great Grandmother.