Patriarch Gregory or Catholicos Gregory may refer to:
Constantinople Gregory of Nazianzus, Patriarch in 379–381 Gregory II of Constantinople, Patriarch in 1283–1289 Gregory III of Constantinople, Patriarch in 1443–1450 Gregory IV of Constantinople, Patriarch in 1623 Gregory V of Constantinople, Patriarch in 1797–1798, 1806–1808 and 1818–1821 Gregory VI of Constantinople, Patriarch in 1835–1840 Gregory VII of Constantinople, Patriarch in 1923–1924
Alexandria Patriarch Gregory of Cappadocia, Patriarch in 339-345 Patriarch Gregory I of Alexandria, Patriarch in 1243–1263 Patriarch Gregory II of Alexandria, Patriarch in 1316–1354 Patriarch Gregory III of Alexandria, Patriarch in 1354–1366 Patriarch Gregory IV of Alexandria, Patriarch in 1398–1412 Patriarch Gregory V of Alexandria, Patriarch in 1484–1486
Bulgaria Gregory of Bulgaria, Patriarch c. 940 – c. 960
Armenian Apostolic Church Gregory the Illuminator (c. 257 – c. 331), patron saint and first official head of the Armenian Apostolic Church Grigoris (catholicos), 4th-century catholicos of Caucasian Albania and martyr Gregory II the Martyrophile (1066–1105) Grigor III Pahlavuni (1093–1166), Catholicos Gregory III of Cilicia (1113–1166) (1173–1193) Gregory V of Cilicia (1193–1194) Gregory VI of Cilicia (1194–1203) Gregory VII of Cilicia (1293–1307) (1411–1418) Gregory IX of Cilicia (1439–1446) Gregory X of Armenia (1443–1465) Gregory XI of Armenia (1536–1545) Gregory XII of Armenia (1576–1590)
Armenian Catholic Patriarchs of Cilicia (1788–1812) (1815–1841) (1844–1866) Gregorio Pietro XV Agagianian (1895-1971), Armenian Catholic Patriarch of Cilicia in 1937-1962 Gregory Peter XX Ghabroyan (1934–2021), Armenian Catholic Patriarch of Cilicia since 2015
See also Gregory IV of Athens, Metropolitan of Athens in 1827–1828 Pope Gregory (disambiguation) Saint Gregory (disambiguation) Gregory (disambiguation) Gregory (given name)