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