Gregory III
Gregory III. is the name of:
- Gregory III. ( Pope ) ( † 741 ), Pope 731-741
- Gregory III. Pahlavuni († ~ 1166 ), Catholicos of the Armenian Apostolic Church
- Gregory III. ( Alexandria ) ( † 1366), the Orthodox Patriarch of Alexandria
- Gregory III. Mammas († 1459 ), Patriarch of Constantinople Opel
- Gregory III. Laham ( born 1933), patriarch of the Melkite Greek Catholic Church
- Disambiguation