HRH Charles's 13-Great Grandmother. P.M. Cameron's 15-Great Grandmother. HRH Albert II's 14-Great Grandmother. Louis XVII's 9-Great Grandmother. HM Juan Carlos' 13-Great Grandmother. Philippe of Belgium's 13-Great Grandmother. HM Manuel II's 12-Great Grandmother. Grand Duke Henri's 13-Great Grandmother. HM Margrethe II's 13-Great Grandmother. HM Beatrix's 12-Great Grandmother. HM Constantine II's 13-Great Grandmother. HM Carl XVI Gustaf's 13-Great Grandmother. HM Harald V's 13-Great Grandmother. Ksr Wilhelm II's 11-Great Grandmother. HM Umberto II's 12-Great Grandmother. `Red Baron' Richthofen's 12-Great Grandmother. HRH Catharina-Amalia's 14-Great Grandmother.