HRH Charles's 11-Great Grandfather. HM Juan Carlos' 10-Great Grandfather. Philippe of Belgium's 10-Great Grandfather. HM Manuel II's 9-Great Grandfather. Grand Duke Henri's 10-Great Grandfather. HM Margrethe II's 10-Great Grandfather. HM Beatrix's 10-Great Grandfather. HM Constantine II's 10-Great Grandfather. HM Carl XVI Gustaf's 10-Great Grandfather. HM Harald V's 10-Great Grandfather. Ksr Wilhelm II's 8-Great Grandfather.