Poss. Louis XVII's 9-Great Grandfather. Poss. HM Juan Carlos' 14-Great Grandfather. Philippe of Belgium's 12-Great Grandfather. Poss. HM Manuel II's 13-Great Grandfather. Grand Duke Henri's 12-Great Grandfather. HM Margrethe II's 13-Great Grandfather. HM Carl XVI Gustaf's 13-Great Grandfather. HM Harald V's 12-Great Grandfather. HM Umberto II's 11-Great Grandfather.