Christian codices like Vaticanus and Sinaiticus copied a pre-Christian Jewish Greek Old Testament; they did not create a new Christian translation from Hebrew.
Lucian of Antioch and the Lucianic Revision of the Greek Old Testament
The Lucianic recension of the Septuagint refined an existing Greek text, aligning it with Hebrew tradition and shaping Byzantine textual transmission.
Ancient Greek Translations of the Old Testament: History, Origin, Character, and Scholarly Usefulness
Greek translations of the Old Testament—LXX, Jewish revisions, Hexapla, and major codices—serve the Hebrew text and aid the restoration of the original words.
Ancient Manuscripts of the Septuagint: Codices, Papyri, and the Main Textual Families
Vaticanus, Sinaiticus, and Alexandrinus anchor the Septuagint; early papyri confirm its pre-Christian use; Hexaplaric, Antiochene, and kaige lines explain its variants.
The Greek Septuagint Translation (LXX)
The Septuagint, a Greek translation of the Hebrew Bible, includes additional texts and distinct canonical variations, influencing biblical studies significantly.

