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- Andrei (Moldovan)
- Andrei (Rymarenko) of Rockland
- Andrei Orlov
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- Andrew (Komarov) of Dnepropetrovsk
- Andrew (Moldovan) of Detroit
- Andrew (Peshko) of Krateia
- Andrew (Rymarenko)
- Andrew (Rymarenko) of Rockland
- Andrew (Trempelas) of Dryinoupolis
- Andrew (Vujisić)
- Andrew (Vujisić) of Tralles
- Andrew Kashevaroff
- Andrew Louth
- Andrew Rublev
- Andrew Stratelates
- Andrew Tregubov
- Andrew of Constantinople
- Andrew of Crete
- Andrew the Fool-for-Christ
- Andrews (Ibrahim) the Samuelite
- Andriy (Peshko) of Krateia
- Andronicus of Sardis
- Andronik (Nikolsky) of Perm
- Andronik of Moscow
- Andronik of Perm
- Andronikov Monastery (Moscow)
- Angel
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- Angola
- Anianus of Alexandria
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- Anicetus of Rome
- Anna
- Annunciation
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- Annunciation Cathedral (Kazan Kremlin, Russia)
- Annunciation Cathedral (Kyoto, Japan)
- Annunciation Cathedral of Kazan Kremlin
- Annunciation Greek Orthodox Cathedral (San Francisco, California)
- Annunciation to the Theotokos
- Anomoeanism
- Ansgar
- Antarctica
- Ante-Nicene
- Ante-Nicene Fathers
- Anthimos (Dionysios) Roussas of Thessalonica
- Anthimos (Drakonakis) of Christoupolis
- Anthimos (Drakonakis) of Olympus
- Anthimos (Roussas) of Thessalonica
- Anthimus III of Constantinople
- Anthimus IV of Constantinople
- Anthimus I of Constantinople
- Anthimus VII (Tsatsos) of Constantinople
- Anthimus VI of Constantinople
- Anthimus V of Constantinople
- Anthimus of Chios
- Anthimus of Jerusalem
- Anthimus of Nicomedia
- Anthologion
- Anthony
- Anthony, John, and Eustathios
- Anthony, John, and Eustathius of Vilna
- Anthony, John, and Eustathius of Vilnius
- Anthony (Azizov) of Akhtubinsk and Enotaevka
- Anthony (Bartoshevich) of Geneva
- Anthony (Bashir) of New York
- Anthony (Bloom) of Sourozh
- Anthony (Cheremisov) of Krasnoyarsk
- Anthony (Cheremisov) of Krasnoyarsk and Yenisei
- Anthony (Cheremisov) of Oryol
- Anthony (Gergiannakis) of San Francisco
- Anthony (Grabbe) of New York
- Anthony (Khrapovitsky) of Kiev
- Anthony (Medvedev) of San Francisco
- Anthony (Michaels) of Toledo
- Anthony (Moskalenko) of Uralsk
- Anthony (Moskalenko) of Uralsk and Guryevskiy
- Anthony (Scharba) of Hierapolis
- Anthony (Vadkovsky) of St. Petersburg
- Anthony (Vadkovsky) of St. Petersburg and Ladoga
- Anthony (Woolf)
- Anthony Bashir
- Anthony Bloom
- Anthony III Studite of Constantinople
- Anthony II (Kauleas) of Constantinople
- Anthony IV of Constantinople
- Anthony I (Kassymatas) of Constantinople
- Anthony I (Zybelin) of Kazan
- Anthony M. Coniaris
- Anthony Woolf
- Anthony of Alexandria
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- Antiochian Orthodox Archdiocese of Australia, New Zealand, and All Oceania
- Antiochian Orthodox Archdiocese of Australia, New Zealand and the Philippines
- Antiochian Orthodox Archdiocese of Australia and New Zealand
- Antiochian Orthodox Archdiocese of Europe
- Antiochian Orthodox Archdiocese of Santiago and All Chile
- Antiochian Orthodox Archdiocese of Toledo and Dependencies
- Antiochian Orthodox Archdiocese of Western and Central Europe
- Antiochian Orthodox Archdiocese of the British Isles and Ireland
- Antiochian Orthodox Christian Archdiocese of Australia
- Antiochian Orthodox Christian Archdiocese of Australia, New Zealand and the Philippines
- Antiochian Orthodox Christian Archdiocese of Australia and New Zealand
- Antiochian Orthodox Christian Archdiocese of North America
- Antiochian Orthodox Deanery of the United Kingdom and Ireland
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- Antiphon
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- Antiphons
- Anton Gregryevich Rubinstein
- Anton Vladimirovich Kartashev
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- Antoninus (Pokrovsky) of Alaska
- Antonio (de Rosso) of Ravenna
- Antonio De Rosso
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- Antony (Bashir) of New York
- Antony (Scharba) of Hierapolis
- Antony Bashir
- Antony II Kauleas of Constantinople
- Antony IV of Constantinople
- Antony I Kassymatas of Constantinople
- Antoun (Khouri) of Miami
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