Leontius or Leontios (Λεοντιος) is a male name of Greek origin, popular in Byzantine Empire and in Orthodox countries.
Variations: French: Léonce, Italian: Leonzio, Spanish: Leoncio, Russian: Leontiy (Леонтий).
It may refer to:
Saints Leontius (died 70–79), of Leontius, Hypatius and Theodulus Leontius of Camerino (d. c. 250), bishop of Camerino Leontius and Euprepius (d.c. 287 or c. 303 AD), brothers of Cosmas and Damian Leontius of Caesarea (died 337), bishop of Caesarea and saint Leontius of Autun (died ), bishop of Autun and saint Leontius of Vanand (died 455), namesake of the Leontine martyrs Leontius of Fréjus (died 488), bishop of Fréjus and saint Leontius the Elder (d. c. 541), bishop of Bordeaux Leontius of Saintes, bishop of Saintes, 7th century Leontius of Constantinople, with Martyrs Julian, Marcian, John, James, Alexius, Demetrius, Photius, Peter, and Mary (d. 730), feast day August 9, Eastern Orthodox liturgics Leontius of Rostov (), Russian Orthodox bishop and saint, feast day May 23 Leontius of Monemvasia and Achaia (1377–1452), Greek Orthodox ascetic and saint Leontius von Wimpffen of Tsarevo (1873–1919), Russian Orthodox bishop of Yenotayevka and hieromartyr Leontius Stasievich (1884–1972), Russian Orthodox archimandrite and New Confessor Others Church figures Leontius of Antioch or Leontius the Eunuch (4th century), Patriarch of Antioch 344–358 Leontius of Trier (died 446), bishop of Trier Leontius, Bishop of Magnesia () Leontius of Byzantium (485–543), Byzantine theological writer Leontius I of Bordeaux, Archbishop of Bordeaux after 520 Leontius II of Bordeaux, Archbishop of Bordeaux 542–564 Leontius (archbishop of Lyon) (early 6th century) Leontius of Jerusalem (6th century), Byzantine theological writer historically confused with Leontius of Byzantium Leontios of Neapolis (7th century), bishop of Neapolis Łewond (fl. late 8th century), Armenian priest and historian Leontius of Damascus (), Syrian monk and writer Leontius of Bulgaria, Patriarch of Bulgaria Leontius I of Jerusalem, Patriarch of Jerusalem 911–928 Leontius of Alexandria (11th century), Greek Patriarch of Alexandria 1052–1059 Leontius of Ruisi (11th century), Georgian chronicler Leontius II of Jerusalem (died 1190), Patriarch of Jerusalem 1170–1190 Leontius of Constantinople (died after 1190), Ecumenical Patriarch of Constantinople 1189 Leontius Pilatus (died 1366), Greek Calabrian scholar Leontius Pełczycki (died 1595), Orthodox and Uniate bishop in Lithuania Leontius, Metropolitan of Belgrade, Metropolitan of Belgrade 1801–1813 Leontios of Cyprus (1896–1947), Archbishop of Cyprus Leontius Turkevich (1876–1965), Metropolitan of the North American Diocese of the Russian Orthodox Church 1950–1965 Rulers and warriors Domitius Leontius, politician of the Roman Empire in the 4th century AD. Leontius (usurper) (died 488), Byzantine usurper 484–488, sometimes Leontius I Leontius (general under Phocas) (7th-century), Byzantine general Leontius (d. 706), Byzantine emperor Others Leontios Machairas ( – after 1432), historian in Cyprus Leontios Chatziapostolou (1894–1980), Greek lawyer and politician Leontios Petmezas (born 1965), Greek contemporary theorist, art historian, book critic, author, and journalist
In philosophy Leontius son of Aglaion, an imaginary character in Plato's Republic used to convey a principle