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- Joannicus and Sophronius Likhud
- Joasaph (Bolotov) of Kodiak
- Joasaph (Skorodumov) of Buenos Aires
- Joasaph (Skorodumov) of Canada and Argentina
- Joasaph (Udalov) of Chistopol
- Joasaph II (Novotorzhets) of Moscow
- Joasaph II of Constantinople
- Joasaph I of Constantinople
- Joasaph of Edmonton
- Joasaphus I of Moscow
- Job
- Job (Boretsky) of Kiev
- Job (Getcha)
- Job (Getcha) of Telmessos
- Job (Kresovich) of Kazan
- Job (Osacky) of Chicago
- Job (Smakouz) of Kashira
- Job (Tyvonyuk) of Chelyabinsk
- Job (disambiguation)
- Job I of Antioch
- Job of Moscow
- Job of Pochaev
- Job the Long-suffering
- Joel (Fragkakis) of Edessa
- John
- John (Abdalah) of Worcester
- John (Abdalah) of Worcester and New England
- John (Alexeev)
- John (Berzins) of Caracas
- John (Bodnachuk)
- John (Bodnarchuk) of Zhytomyr
- John (Bērziņš)
- John (Bērziņš) of Caracas
- John (Derewianka) of Parnassus
- John (Garklavs) of Chicago
- John (Kallos) of Amorion
- John (Kallos) of Amorium
- John (Kallos) of Amoriun
- John (Karastamatis) of Santa Cruz
- John (Krestiankin)
- John (Martin) of Nyssa
- John (Maximovitch) of San Francisco
- John (Maximovitch) of Shanghai
- John (Maximovitch) the Wonderworker
- John (Mitropolsky) of the Aleutians
- John (Pommers) of Riga
- John (Rinne) of Nicea
- John (Roshchin)
- John (Roshchin) of Naro-Fominsk
- John (Shahovskoy) of San Francisco
- John (Snychev) of St. Petersburg
- John (Snychov) of St. Petersburg
- John (Stinka) of Winnipeg
- John (Wendland) of New York and the Aleutians
- John (Yazigi) of Western Europe
- John (Yazigi) of al-Hosn
- John (Zachariou) of Johannesburg
- John (Ziobin) of Alaska
- John (Zizioulas) of Pergamon
- John (Zlobin)
- John (Zlobin) of Alaska
- John (disambiguation)
- John A. Jillions
- John Anthony McGuckin
- John Behr
- John Breck
- John Cassian
- John Chrysostom
- John Chryssavgis
- John Climacus
- John Granger
- John H. Erickson
- John III Doukas Vatatzes
- John III Vatatzes
- John III of Alexandria
- John III of Jerusalem
- John II Cappadocia of Constantinople
- John II of Alexandria
- John II of Jerusalem
- John II of Novgorod
- John II of Rome
- John IV of Constantinople
- John IX of Rome
- John I Talaia of Alexandria
- John I of Antioch
- John I of Jerusalem
- John James the Chozebite
- John Jillions
- John Karastamatis of Santa Cruz
- John Kass
- John Kochurov
- John Krestiankin
- John Maximovitch
- John Maximovitch of Tobolsk
- John Meyendorff
- John Naukliros
- John Nehrebecki
- John Paul I
- John Paul II
- John S. Romanides
- John Scholasticus
- John Scottus Eriugena
- John Shehadie
- John Tavener
- John VIII of Rome
- John VII Grammaticus of Constantinople
- John VII of Jerusalem
- John VII of Rome
- John VII the Oxite
- John VI of Constantinople
- John V of Constantinople
- John V of Jerusalem
- John Vatatzes the Merciful
- John XIV Kalekas of Constantinople
- John XI Bekkos of Constantinople
- John XVIII of Rome
- John XVII of Rome
- John XVI of Rome
- John X (Camateros) of Constantinople
- John X (Yazigi) of Antioch
- John X of Rome
- John Zizioulas
- John and Ann Betar
- John behr
- John of Antioch
- John of Beverley
- John of Beverly
- John of Damascus
- John of Kronstadt
- John of Mardin
- John of Novgorod and Wonderworker
- John of Phanidjoit
- John of Riga
- John of Rila
- John of Sedre
- John of Vilna
- John of the Ladder
- John the Baptist
- John the Cantor
- John the Faster
- John the Forerunner
- John the Hairy
- John the Merciful
- John the New of Ioannina
- John the New of Suceava
- John the Russian
- John the Silent
- John the Theologian
- John the Wonderworker
- John the Wonderworker of San Francisco and Shanghai
- Joint International Commission for the Theological Dialogue between the Roman Catholic Church and the Orthodox Church
- Jon Braun
- Jon E. Braun
- Jonah
- Jonah (Karpukhin) of Astrakhan and Kamyzyak
- Jonah (Lwanga) of Kampala
- Jonah (Lwanga) of Kampala and All Uganda
- Jonah (Paffhausen)
- Jonah (Paffhausen) of Fort Worth
- Jonah (Paffhausen) of Washington
- Jonah (Paffhausen) of Washington and New York
- Jonah (Stahlberg) of Washington
- Jonah (Stalberg)
- Jonah (disambiguation)
- Jonah of Manchuria
- Jonah of Moscow
- Jonas of Moscow
- Jonathan (Tsvetkov) of Abakan
- Josaphat
- Jose (Cortes y Olmos) of Mexico City
- Jose Muñoz-Cortes
- Joseph (Al-Zehlaoui) of Los Angeles
- Joseph (Al-Zehlaoui) of New York
- Joseph (Bosakov) of America and Australia
- Joseph (Harkiolakis)
- Joseph (Harkiolakis) of New Zealand
- Joseph (Harkiolakis) of Proikonnisos
- Joseph (Jandieri) the Wonderworker
- Joseph (Litovkin) of Optina
- Joseph (Petrovykh) of Petrograd
- Joseph (Spilaiotis)
- Joseph (Zuk) of New Jersey
- Joseph (Žuk) of New Jersey
- Joseph II of Constantinople
- Joseph II of Jerusalem
- Joseph I (Galesiotes) of Constantinople
- Joseph J. Pishtey II
- Joseph Julian Overbeck
- Joseph P. Kreta
- Joseph Smith, Jr.
- Joseph of Arimathea
- Joseph of Moscow
- Joseph of Vatopedi
- Joseph of Volokolamsk
- Joseph the Betrothed
- Joseph the Hesychast
- Joseph the Hymnographer
- Josephus
- Joshua
- Joshua of Navi
- Josiah Trenham
- José (Cortés y Olmos) of Mexico City
- José Muñoz-Cortes
- Journeys to Orthodoxy
- Jovan (Purić) of Niš
- Jovan (Vraniskovski) of Ohrid
- Jovan VI (Vraniskovski) of Ohrid
- Jovan VI (Vraniškovski) of Ohrid
- Jovinian
- Judaism
- Judaism and Early Christianity
- Judas Iscariot
- Judas of Jerusalem
- Julian Calendar
- Julian calendar
- Julian of Halicarnassus
- Julian the Apostate
- Juliana of Lazarevo
- Juliana of Nicomedia
- Julianism
- Julius and Aaron
- Julius of Goa
- July 1
- July 10
- July 11
- July 12
- July 13
- July 14
- July 15
- July 16
- July 17
- July 18
- July 19
- July 2
- July 20
- July 21
- July 22
- July 23
- July 24
- July 25
- July 26
- July 27
- July 28
- July 29
- July 3
- July 30
- July 31
- July 4
- July 5
- July 6
- July 7
- July 8
- July 9
- June 1
- June 10
- June 11
- June 12
- June 13
- June 14
- June 15
- June 16
- June 17
- June 18
- June 19
- June 2
- June 20
- June 21
- June 22
- June 23
- June 24
- June 25
- June 26
- June 27
- June 28
- June 29
- June 3
- June 30
- June 4
- June 5
- June 6
- June 7
- June 8
- June 9
- Jurisdiction
- Just war
- Justification
- Justin
- Justin I
- Justin II
- Justin Martyr
- Justin Popovich
- Justin the Philosopher
- Justinian
- Justinian (Ovchinnikov) of Kalmykia and Elista
- Justinian (Ovchinnikov) of Naro-Fominsk
- Justinian I
- Justinian II
- Justinian of Ramsey Island
- Justinian the Great
- Justus
- Justus of Canterbury
- Juvenal of Alaska
- Juvenal of Jerusalem
- Juvenaly (Kilin) of Izhevsk
- Juvenaly (Kilin) of Qiqihar
- Juvenaly (Poyarkov) of Krutitsy
- Juvenaly of Alaska
- Kafsokalyvia Skete (Athos)
- Kalinik I of Pec
- Kallinikos (Pippas) of Pelusium
- Kallinikos (Pippas) of Pilousion
- Kallinikos of Asia
- Kalliopius
- Kallistite Synod
- Kallistos (Papageorgapoulos) of San Francisco
- Kallistos (Papageorgopoulos) of San Francisco
- Kallistos (Samaras)
- Kallistos (Samaras) of Zelon
- Kallistos (Ware) of Diokleia
- Kallistos Ware
- Kallistos of Zelon
- Kamennoi
- Kamennoi Monastery
- Kamenny Monastery
- Kamilavka
- Karakalou Monastery (Athos)
- Karl Krumbacher
- Karras Valerie A
- Karterios
- Karyes (Athos)
- Kassiani the Hymnographer
- Katasarkion
- Katavasia
- Katherine
- Katherine (Weston)
- Kathisma
- Kathismata
- Katholikon
- Katounakia Fathers (Athos)
- Kazan Cathedral (Moscow)
- Kazan Cathedral (St. Peterburg)
- Kazan Cathedral (St. Petersburg)
- Kazan Theological Academy
- Kedron of Alexandria
- Keharitomeni