The patriarch of Antioch is one of the Eastern Orthodoxpatriarchs, the leader of the autocephalousGreek Orthodox Church of Antioch. The term "Greek" does not refer to ethnic origin; the majority of these patriarchs were not ethnic Greeks, but rather Hellenized Arabs, Arameans, Assyrians, and other Levantines who spoke Greek and adopted a Hellenic identity. It refers to the fact that this church follows the Chalcedonian Orthodoxy associated with the (Greek-speaking) Byzantine Empire. Since 518, there have been two patriarchs of Antioch who call themselves Orthodox: the Chalcedonian ones listed here, and the non-Chalcedonian Syriac Orthodox patriarchs of Antioch.
Greek Orthodox patriarchs of Antioch from 518 to 1724
The Greek Orthodox Patriarchate of Antioch split into two factions in 1724 as the Melkite Greek Catholic Church broke communion with the Orthodox Church and established communion with the Catholic Church. Both groups recognize the same list of patriarchs for the period before 1724, but have had different patriarchs since.
Grumel, Venance (1934). "Le patriarcat et les patriarches d'Antioche sous la seconde domination byzantine (969-1084)". Échos d'Orient. 33 (174): 129–147. doi:10.3406/rebyz.1934.2786.