The story
- Koine Greek · derived fromοἱ
- Medieval Latin · borrowed fromLXX
- English todayLXX
From Medieval Latin LXX, a calque of Koine Greek οἱ Ο′ (hoi O′, “the 70”), used as an abbreviated title for the Septuagint, q.v.
Etymology from Wiktionary, CC BY-SA 4.0.