The OT of the most ancient surviving Christian Bible manuscripts - Codex Vaticanus (4th century), Codex Sinaiticus (4th century) and Codex Alexandrinus (5th century) - are Greek Septuagint text.

(The Hebrew text, a transliteration in Greek letters of the Hebrew text, the Greek Septuagint translation, and three other Greek translations that had been made in a Jewish milieu.) ...

‘Easter’ is found in English and German but in most other European languages the word for the festival comes from old words for ‘Passover’.