is a specific kind of: emperor.

instances of which are: Carolus, Charlemagne, Charles, Charles I, Charles the Great | Charles, Charles I, Charles II, Charles the Bald | Ferdinand I | Ferdinand II | Ferdinand III | Emperor Francis II, Francis II | Barbarossa, Frederick Barbarossa, Frederick I | Frederick II, Holy Roman Emperor Frederick II | Henry IV | Henry VII | Otho I, Otto I, Otto the Great ... show more.