| Duke of OELS | 1321 - |
| Baron dīOISELET | 1250 - |
| Ct of OLDENBURG | 1142 - |
| Duke of OLDENBURG | 1785 - 1918 |
| Duke of OPPELN | 1170 - |
| Prince of ORANGE | 1584 - 1702 |
| Rulers of ORLAMÜNDE | 1100 - 1373 |
| Duc dīORLEANS | 1407 - |
| Duc dīORLEANS | 1715 - |
| Pr of ORLEANS-BRAGANZA | 1900 - |
| Ct von ORTENBURG | 1160 - today |
| Mkgf der OSTMARK | 976 - 1055 |
| Mkgf der OSTMARK (Niederlausitz) | 1046 - |
| A B C D E F G H I J K L M N O P R S T U V W Y Z |
(C) Copyright Miroslav MAREK