HRH Charles's 14-Great Grandfather. Philippe of Belgium's 16-Great Uncle. HM Manuel II's 14-Great Uncle. Grand Duke Henri's 15-Great Uncle. HM Margrethe II's 14-Great Grandfather. HM Beatrix's 13-Great Grandfather. HM Constantine II's 14-Great Grandfather. HM Carl XVI Gustaf's 15-Great Grandfather. Ksr Wilhelm II's 12-Great Grandfather.