List of Famous people named Constantine

Constantine I, also known as Constantine the Great, was a Roman emperor from 306 to 337. Born in Naissus, Dacia Mediterranea, he was the son of Flavius Constantius, an Illyrian army officer who became one of the four emperors of the Tetrarchy. His mother, Helena, was Greek and of low birth. Constantine served with distinction under emperors Diocletian and Galerius campaigning in the eastern provinces against barbarians and the Persians, before being recalled west in 305 to fight under his father in Britain. After his father's death in 306, Constantine was acclaimed as emperor by the army at Eboracum (York). He emerged victorious in the civil wars against emperors Maxentius and Licinius to become sole ruler of the Roman Empire by 324.

Constantine II reigned as the King of Greece from 6 March 1964 until the abolition of the monarchy on 1 June 1973.

Constantine I was King of Greece from 18 March 1913 to 11 June 1917 and from 19 December 1920 to 27 September 1922. He was commander-in-chief of the Hellenic Army during the unsuccessful Greco-Turkish War of 1897 and led the Greek forces during the successful Balkan Wars of 1912–1913, in which Greece expanded to include Thessaloniki, doubling in area and population. He succeeded to the throne of Greece on 18 March 1913, following his father's assassination.

Constantine XI Dragases Palaiologos or Dragaš Palaeologus was the last Byzantine emperor, reigning from 1449 until his death in battle at the Fall of Constantinople in 1453. Constantine's death marked the end of the Byzantine Empire, which traced its origin to Constantine the Great's foundation of Constantinople as the Roman Empire's new capital in 330. Given that the Byzantine Empire was the Roman Empire's medieval continuation, with its citizens continually referring to themselves as Romans, Constantine XI's death and Constantinople's fall also marked the definitive end of the Roman Empire, founded by Augustus almost 1,500 years earlier.

Constantine James Maroulis is an American actor and rock singer from Wyckoff, New Jersey. He was the sixth-place finalist on the fourth season of the reality television series American Idol, and received a nomination for the Tony Award for Best Performance by a Leading Actor in a Musical for his role in Rock of Ages. He starred in the title role in Jekyll and Hyde on Broadway, for which he received a Drama League Award Nomination for a Distinguished Performance Award.

Constantine VI was Byzantine Emperor from 780 to 797. The only child of Emperor Leo IV, Constantine was named co-emperor with him at the age of five in 776 and succeeded him as sole Emperor in 780, aged nine. His mother Irene exercised control over him as regent until 790, assisted by her chief minister Staurakios. The regency ended when Constantine reached maturity, but Irene sought to continue her participation in government. After a few years of sole rule Constantine named his mother Empress in 792, making her his official colleague.

Constantine X Doukas or Dukas, Latinised as Ducas, was Byzantine Emperor from 1059 to 1067. He was the founder and first ruling member of the short-lived Doukid dynasty. During his reign, the Normans took over much of the remaining Byzantine territories in Italy while in the Balkans the Hungarians occupied Belgrade. He also suffered defeats by the Seljuk sultan Alp Arslan.

Constantine Chiwenga, is a Zimbabwean politician and former army general currently serving, since 2017, as the First Vice-President of Zimbabwe under President Emmerson Mnangagwa. In August 2020, he added the Health Ministry to his portfolio.

Constantine Michael Louloudis is a Greek-British rower. He is a dual Olympian, two time Olympic medal winner and two time world champion.

Constantine II was Roman emperor from 337 to 340. Son of Constantine the Great and co-emperor alongside his brothers, his attempt to exert his perceived rights of primogeniture led to his death in a failed invasion of Italy in 340.