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- Gregory (Grabbe) of Washington and Florida
- Gregory (Hatziouraniou) of Mesaoria
- Gregory (Krug)
- Gregory (Orologas) of Kydonies
- Gregory (Stergiou) of Cameroon
- Gregory (Stergiou) of Cameroon and Exarch of Central Africa
- Gregory (Tatsis) of Nyssa
- Gregory (Wendt)
- Gregory (disambiguation)
- Gregory Bar-Hebræus
- Gregory Efimovich Rasputin
- Gregory III of Constantinople
- Gregory III of Rome
- Gregory II of Alexandria
- Gregory II of Constantinople
- Gregory II of Rome
- Gregory IV (Haddad) of Antioch
- Gregory IV of Athens
- Gregory IV of Rome
- Gregory Palamas
- Gregory Protopsaltes the Byzantios
- Gregory VII of Constantinople
- Gregory VI of Constantinople
- Gregory V of Constantinople
- Gregory of Antioch
- Gregory of Nazianzus
- Gregory of Neocaesarea
- Gregory of Nyssa
- Gregory of Sinai
- Gregory of Tours
- Gregory the Byzantine
- Gregory the Decapolite
- Gregory the Dialogist
- Gregory the Enlightener
- Gregory the Great
- Gregory the Theologian
- Gregory the Wonderworker
- Grigirianstvo
- Grigol Peradze
- Grigorios (Tatsis) of Nyssa
- Grigoriou Monastery (Athos)
- Grigory (Chukov) of Leningrad
- Guardian angel
- Guettee
- Guri (Demidov)
- Gurias (Karpov) of Simferopol
- Gurius
- Gury (Karpov)
- Gury (Rugotin)
- Gury of Kazan
- Guthlac
- Guthlac of Crowland
- Gynaikeion
- H. Tristram Engelhardt
- HH Baselios Didymos I
- HOCNA
- Habakkuk
- Habbakuk
- Habeeb Kheshy
- Haggai
- Haghia Sophia
- Hagia Eirene (Constantinople)
- Hagia Sophia
- Hagia Sophia (Białystok, Poland)
- Hagia Sophia (Constantinople)
- Hagia Sophia (disambiguation)
- Hagiographer
- Hagiography
- Hail Mary
- Halite
- Halki
- Halloween
- Hallvard of Norway
- Hand Cross
- Harakas
- Haralambos
- Haralampus of Magnesia
- Harold of England
- Havryil Kostelnyk
- Head Coverings
- Heaven
- Hedeon (Balaban) of Lviv
- Hegumen
- Helen
- Helen of Caernarfon
- Helena
- Helena Dragaš
- Hellenic College (Brookline, Massachusetts)
- Henophysitism
- Henoticon
- Heologos (Chrysanthakopoulos) of Brazzaville
- Heraclea
- Heraclius
- Heraklas of Alexandria
- Heresies
- Heresy
- Heretic
- Heritage of the Coptic Orthodox Church
- Herman (Aav) of Finland
- Herman (Podmoshensky)
- Herman (Sadyrev-Polevoy) of Kazan
- Herman (Swaiko) of Washington
- Herman (Swaiko) of Washington and New York
- Herman of Alaska
- Hermeneutics
- Hermione
- Hermit
- Hermitage
- Hermitage of the Holy Cross (Wayne, West Virginia)
- Hermitess
- Hermogenes of Moscow
- Hermogenus of Moscow
- Hermon of Jerusalem
- Hesperinos
- Hesperus, Zoe, Cyriacus, and Theodulus
- Hesychasm
- Hesychast
- Hesychastarion
- Hesychasterion
- Heterodox
- Heterodoxy
- Hexapla
- Hexapsalmos
- Hierapolis (Turkey)
- Hierarch
- Hierarchs of the Diocese of Kazan
- Hierarchs of the Russian North American Mission
- Hierarchs of the Russian North American mission
- Hieratikon
- Hierodeacon
- Hieromartyr
- Hieromartyrs of Cherson
- Hieromonk
- Hierotheos (Garifalos) of Lemnos
- Hierotheos (Vlachos) of Nafpaktos
- Hierotheus II of Alexandria
- Hierotheus I of Alexandria
- Hierotheus of Athens
- Hierotheus of Jerusalem
- Higher Ecclesiastical Schools of Greece
- Hilarion (Alfeyev) of Vienna
- Hilarion (Alfeyev) of Volokolamsk
- Hilarion (Kapral) of Manhattan
- Hilarion (Kapral) of New York
- Hilarion (Kapral) of Sydney
- Hilarion (Ohienko) of Winnipeg
- Hilarion (Rogalevsky) of Chernigov
- Hilarion (Rudnyk) of Edmonton
- Hilarion (Troitsky) of Verey
- Hilarion (Troitsky) of Vereya
- Hilarion (Troitsky of Verey
- Hilarion (Waas)
- Hilarion Alfeyev
- Hilarion of Didymotichon
- Hilarion of Kiev
- Hilarion of Meglin
- Hilarion of Optina
- Hilarion the Great
- Hilarion the New
- Hilarionos
- Hilary of Poitiers
- Hilda of Whitby
- Hippolytus of Rome
- Historia ecclesiastica gentis Anglorum
- History of Antiochian Orthodoxy in Australasia
- History of Orthodox Missions
- History of missions
- History of the Church
- History of the Patriarchs of the Coptic Church of Alexandria
- Holy Annunciation Orthodox Church (Brisbane, Australia)
- Holy Apostles Convent
- Holy Apostles Convent (Buena Vista, Colorado)
- Holy Archangels Greek Orthodox Monastery (Kendalia, Texas)
- Holy Ascension Cathedral (Unalaska, Alaska)
- Holy Ascension Romanian Orthodox Monastery (Detroit, Michigan)
- Holy Assumption Monastery (Calistoga, California)
- Holy Communion
- Holy Cross Greek Orthodox School of Theology (Brookline, Massachusetts)
- Holy Cross Monastery (Castro Valley, California)
- Holy Cross Monastery (Niagara Falls, New York)
- Holy Cross Orthodox Monastery (Toronto, Ontario)
- Holy Cross Skete (Wayne, West Virginia)
- Holy Doors
- Holy Dormition Convent (Nanuet, New York)
- Holy Dormition Convent on Zilant Hill
- Holy Dormition Kiev-Pechersk Lavra
- Holy Dormition Monastery of Sviyazhsk
- Holy Fathers
- Holy Fire
- Holy Friday
- Holy Ghost
- Holy Gifts
- Holy Gospel
- Holy Innocents
- Holy Land
- Holy Lavra of St. Savas (Jerusalem)
- Holy Light
- Holy Martyrs of China
- Holy Monastery of Saint John the Forerunner
- Holy Monastery of the Life-giving Fount (Poros, Greece)
- Holy Monastery of the Zoodohos Pigis (Poros)
- Holy Mountain
- Holy Myrrh-bearers Church (St. Cloud, Minnesota)
- Holy Myrrhbearers Monastery (Otego, New York)
- Holy Mysteries
- Holy Mystery
- Holy Order of MANS
- Holy Orders
- Holy Orthodox Church Mission of Australia and New Zealand
- Holy Orthodox Church in North America
- Holy Orthodox Metropolis of Australia & Oceania (OC)
- Holy Orthodox Metropolis of Australia & Oceania (Serapheimite)
- Holy Orthodox Metropolis of Australia & Oceania - Holy Synod of the Church of Greece (OC)
- Holy Resurrection Cathedral (Tokyo, Japan)
- Holy Resurrection Church (Belkofski, Alaska)
- Holy Russia
- Holy Saturday
- Holy Scripture
- Holy Scriptures
- Holy Snakes
- Holy Spirit
- Holy Supper
- Holy Synod
- Holy Synod in Resistance
- Holy Synod of Constantinople
- Holy Synod of Coptic Orthodox Church
- Holy Synod of Greece
- Holy Synod of Milan
- Holy Table
- Holy Theophany Church (Nagoya, Japan)
- Holy Tradition
- Holy Transfiguration Greek Orthodox Monastery (Harvard, Illinois)
- Holy Transfiguration Monastery (Bombala, New South Wales)
- Holy Transfiguration Monastery (Boston, Massachusetts)
- Holy Transfiguration Monastery (Brookline, Massachusetts)
- Holy Trinity
- Holy Trinity-St. Sergius Lavra
- Holy Trinity Cathedral (San Francisco, California)
- Holy Trinity Chapel (Fort Ross, California)
- Holy Trinity Church (Butte, Montana)
- Holy Trinity Church (Pyongyang)
- Holy Trinity Church (San Francisco, California)
- Holy Trinity Greek Orthodox Church San Francisco
- Holy Trinity Monastery (Jordanville, New York)
- Holy Trinity Monastery (Meteora)
- Holy Trinity Orthodox Cathedral (Chicago, Illinois)
- Holy Trinity Orthodox Monastery (Monkerai, New South Wales)
- Holy Trinity Orthodox Seminary (Jordanville, New York)
- Holy Trinity St. Seraphim-Diveyevo Convent
- Holy Trinity Ukrainian Orthodox Metropolitan Cathedral (Winnipeg, Manitioba)
- Holy Unction
- Holy Week
- Holy Wisdom
- Holy fool
- Holy fools
- Holy mysteries
- Holy synod
- Holy water
- Holyrood
- Home altar
- Homily
- Homoousios
- Homosexuality
- Hong Kong
- Honorifics
- Honorius I of Rome
- Honorius of Canterbury
- Horologion
- Hosea
- Hosius Of Córdoba
- Hosius the Confessor
- Hospitality of Abraham
- Hospitius the Hermit
- Hour
- Hours
- House Church
- House church
- Hubert of Liège
- Humbert of Silva Candida
- Humility
- Humor Monastery (Bucovina, Romania)
- Hymeneus of Jerusalem
- Hymn
- Hymn of Kassiani
- Hymnographer
- Hymns
- Hymns of Contrition
- Hypakoe
- Hypatius of Gangra
- Hypokoe
- Hypostasis
- Hypostatic Union
- Hypostatic union
- IOCC
- Iakinf (Bichurin)
- Iakinf (Bichurin) of Beijing
- Iakovos (Coucouzis) of America
- Iakovos (Frantzis) of Mytiline
- Iakovos (Garmatis) of Chicago
- Iakovos (Krinis) of Chicago
- Iakovos (Pachis) of Argolis
- Iakovos (Pililis) of Catania
- Iakovos (Sofroniadis) of Princes Islands
- Iakovos (Tsigounis) of Militoupolis
- Iakovos III (Vavanatsos) of Athens
- Iakovos II of Athens
- Ian Nield
- Ibas of Edessa
- Icon
- Icon New Media Network
- Icon corner
- Icon of the Mother of God of Seven Lakes
- Icon of the Mother of God “The Word Made Flesh”
- Icon screen
- Iconoclasm
- Iconoclast
- Iconodule
- Iconographer
- Iconographers
- Iconography
- Iconostasis
- Icons
- Icons and Home Items
- Icons of the Theotokos
- Idiomelon
- Ieronymos (Kotsonis) of Athens
- Ieronymos (Liapis) of Athens
- Ieronymos (Liapis) of Thebes and Levadeia
- Ieronymos (Muzeeyi) of Mwanza
- Ieronymos II (Liapis) of Athens
- Ieronymos of Aegina
- Ieronymos of Mwanza
- Ierosolymitissa
- Ignatije (Midic) of Pozarevac and Branicevo
- Ignatije (Midić) of Pozarevac
- Ignatios
- Ignatios (Lappas) of Larisa
- Ignatios (Madenlides) of Central Africa
- Ignatios (Madenlides) of Pentapolis
- Ignatios (Sennis) of Antananarivo
- Ignatios (Sennis) of Madagascar
- Ignatios Delis
- Ignatios of Antioch
- Ignatios of Madagascar
- Ignatius