Christian Readers discussion

The calculation of 666 and the origin of the name came before the book of Revelation was written. That’s the subject of my Kindle book which is a free download 3/9-3/13.
666 And The Name

Where did this name "originally" come from, then?

2 cor 6:14 Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
15 And what concord hath Christ with Belial? or what part hath he that believeth with an infidel?
16 And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people.

In Greek it is Beliar, which is a form of Belial which is found 15 times in the OT. It means lawless or,

that wicked
בְלִיַּ֙עַל֙ (ḇə·lî·ya·‘al)
Noun - masculine singular
Strong's 1100: Without profit, worthlessness, destruction, wickedness