Constantine most often refers to: Constantine the Great, Roman emperor from 306 to 337, also known as Constantine I. Constantine, Algeria, a city in Algeria. Constantine may also refer to: People. Constantine (name), a masculine given name and surname. Roman/Byzantine emperors. Constantine II (emperor) Constantine III (Western Roman emperor) Constantine III (Byzantine emperor) Constantine IV. Constantine V. Constantine VI. Constantine VII Porphyrogenitus. Constantine VIII. Constantine IX Monomachos. Constantine X Doukas. Constantine XI Palaiologos. Emperors not enumerated.
https://en.wikipedia.org/wiki/Constantine