Theological School of Halki alumni

Varnava Rosić (Serbian Cyrillic: Варнава Росић) was the Patriarch of the Serbian Orthodox Church between 1930 and 1937.

Metropolitan Anthony of San Francisco was the first Metropolitan Bishop of the Greek Orthodox Metropolis of San Francisco, a metropolis of the Greek Orthodox Archdiocese of America, under the spiritual authority of the Ecumenical Patriarch of Constantinople.

Archbishop Iakovos or Jacob (Greek: Ιάκωβος, July 29, 1911, Imbros, Ottoman Empire – April 10, 2005, Connecticut, United States), born Demetrios Koukouzis (Δημήτριος Κουκούζης) was the Primate of the Greek Orthodox Archdiocese of North and South America (now the Greek Orthodox Archdiocese of America) from 1959 until his resignation in 1996.

Metropolitan Gennadios (secular name Tsampikos Zervos, Greek: Τσαμπίκος Ζερβός; July 8, 1937, Rhodes) is primate of the Metropolis of Italy, a diocese of the Ecumenical Patriarchate covering Italy, Malta, and San Marino.

Athenagoras I (Greek: Αθηναγόρας Αʹ), born Aristocles Matthew Spyrou (Greek: Αριστοκλής Ματθαίος Σπύρου; 6 April [O.S. 25 March] 1886 – July 7, 1972), initially the Greek archbishop in North America, was the 268th Ecumenical Patriarch of Constantinople, from 1948 to 1972.

Germanos Karavangelis (Greek: Γερμανός Καραβαγγέλης, also transliterated as Yermanos and Karavaggelis or Karavagelis, 1866–1935) was born in Stipsi, Lesbos.

Damaskinos Papandreou (born Vasileos Papandreou, Βασίλειος Παπανδρέου; February 23, 1936 in Thermo, Aetolia-Acarnania – November 5, 2011 in Genève) was the Greek Orthodox metropolitan bishop of Adrianople from 2003 until his death.

Bartholomew I (Greek: Πατριάρχης Βαρθολομαῖος Α', Patriarchis Bartholomaios A' , Turkish: Patrik I. Bartholomeos; born 29 February 1940) is the 270th and current Archbishop of Constantinople and Ecumenical Patriarch, since 2 November 1991.

Johannes (John) Wilho Rinne (16 August 1923 – 1 July 2010) was the Orthodox Archbishop of Karelia and All Finland from 1987 to 2001.

Saint Euthymios of Zela the Ethno-Hieromartyr, (Greek: Ὁ Ἅγιος Εὐθύμιος ὁ Ἱερομάρτυρας Ἐπίσκοπος Ζήλων), born Eustratios Agritellis, 1876–1921, was the last resident Bishop of the Diocese of Zela in Amasya, Western Pontus, which he served from June 12, 1912 until his death on May 29, 1921, during the period of the Greek genocide.

Saint Raphael of Brooklyn Arabic: سان رافائيل من بروكلين‎‎ (born Raphael Hawaweeny Arabic: رفائيل هواويني‎‎; November 20, 1860 – February 27, 1915) was bishop of the Russian Orthodox Church, auxiliary bishop of Brooklyn, vicar of Northern-American diocese, head of the Syro-Arabian Orthodox mission.

Stylianos Harkianakis (Greek: Στυλιανός Χαρκιανάκης) is the Greek Orthodox Archbishop of Australia and Primate of the Greek Orthodox Archdiocese of Australia.

Philotheos Bryennios (Greek: Φιλόθεος Βρυέννιος; 7 April 1833 – November 18, 1917) was a Greek Orthodox metropolitan of Nicomedia, and the discoverer in 1873 of an important manuscript with copies of early Church documents.

- Chrysostomos Kalafatis (1867–1922) (Greek: Χρυσόστομος Καλαφάτης), known as Saint Chrysostomos of Smyrna, Chrysostomos of Smyrna and Metropolitan Chrysostom, was the Greek Orthodox metropolitan bishop of Smyrna (Izmir) between 1910 and 1914, and again from 1919 to his death in 1922.

Chrysostomos II (Greek: Χρυσόστομος Β΄, 1880–1968) was Archbishop of Athens and All Greece from 14 February 1962 to 11 May 1967.

Joachim II was Ecumenical Patriarch of Constantinople from 1860 to 1863 and from 1873 to 1878.

Demetrios I also Dimitrios I or Demetrius I, born Demetrios Papadopoulos (September 8, 1914 – October 2, 1991) was the Ecumenical Patriarch of Constantinople from July 16, 1972, to October 2, 1991.

Archbishop Spyridon of America (born George Papageorge) is a retired Greek Orthodox bishop of the Ecumenical Patriarchate who was the archbishop of the Greek Orthodox Archdiocese of America from July 1996 to August 1999.

Anthim I (Bulgarian: Антим I, secular name Atanas Mihaylov Chalakov, Bulgarian: Aтанас Михайлов Чалъков; 1816 – 1 December 1888) was a Bulgarian education figure and clergyman, and a participant in the Bulgarian liberation and church-independence movement.

Photios Kalpidis (Greek: Φώτιος Καλπίδης, 1862–1906) or Photios of Korytsa was the Greek Orthodox metropolitan bishop of Korçë, Ottoman Empire, from 1902 to 1906.

Panteleimon Kotokos (Greek: Παντελεήμων Κοτόκος Αργυροκάστρου; 1890–1969) was a bishop of the Orthodox Autocephalous Church of Albania.

Gregorios Papamichael (Greek: Γρηγόριος Παπαμιχαήλ), 1875–1956, was a theologian of the Orthodox Church of Greece and a renowned professor at the Theology School of the University of Athens (1918-1920, and 1923-1939).

Saint Gregory (Orologas) of Kydonies the Ethno-Hieromartyr, also Gregory of Cydoniae (Greek: Γρηγόριος Ωρολογάς Gregorios Orologas), 1864–1922, was a Greek Orthodox metropolitan bishop in the early 20th century in northwest Anatolia, in the Ottoman Empire.