official title Constantine XIII. born 1940, king of Greece (1964–73): went into exile when the army seized power in 1967. He was officially deposed in 1973 and Greece became a republic
Constantine II in American English
noun
1.
(Flavius Claudius Constantinus) a.d.317–340, emperor of Rome 337–340 (son of Constantine I)
2.
born 1940, king of Greece 1964–74, in exile since 1967