Saint Andrew (Greek: Ἀνδρέας, Andreas; from the early 1st century—mid to late 1st century AD), called in the Orthodox tradition Prōtoklētos, or the First-called, is a Christian Apostle and the brother of Saint Peter. The name "Andrew" (Greek: manly, brave, from ἀνδρεία, Andreia, "manhood, valour"), like other Greek names, appears to have been common among the Jews, Christians, and other Hellenized peoples of the region. No Hebrew or Aramaic name is recorded for him. He is considered the founder and the first bishop of the Church of Byzantium and is consequently the patron saint of the Ecumenical Patriarchate of Constantinople.

The church tradition of Georgia regards St. Andrew as the first preacher of Christianity in the territory of Georgia and as the founder of the Georgian church. This tradition was apparently derived from the Byzantine sources, particularly Nicetas of Paphlagonia (died c. 890) who asserts that "Andrew preached to the Iberians, Sauromatians, Taurians, and Scythians and to every region and city, on the Black Sea, both north and south." The version was adopted by the 10th-11th-century Georgian ecclesiastics and, refurbished with more details, was inserted in the Georgian Chronicles. The story of St. Andrew’s mission in the Georgian lands endowed the Georgian church with apostolic origin and served as a defense argument to George the Hagiorite against the encroachments from the Antiochian church authorities on autocephaly of the Georgian church. Another Georgian monk, Ephraim the Minor, produced a thesis, reconciling St. Andrew’s story with an earlier evidence of the 4th-century conversion of Georgians by St. Nino and explaining the necessity of the “second Christening” by Nino. The thesis was made canonical by the Georgian church council in 1103.