Capetian - a member of the Capetian dynasty

Carlovingian, Carolingian - a member of the Carolingian dynasty

czar, tsar, tzar - a male monarch or emperor (especially of Russia prior to 1917)

Emperor - the male ruler of an empire

chief of state, head of state - the chief public representative of a country who may also be the head of government

king, male monarch - a male sovereign; ruler of a kingdom

Merovingian - a member of the Merovingian dynasty

swayer, ruler - a person who rules or commands; "swayer of the universe"

Shah, Shah of Iran - title for the former hereditary monarch of Iran

Hanoverian - any of the British sovereigns belonging to the House of Hanover