Concise Bible Dictionary:

The Hebrew word signifies “worthless, lawless,” and is not a proper name, but is used as a personification of evil; thus we have “son of Belial, daughter of Belial” (Deut. 13:1313Certain men, the children of Belial, are gone out from among you, and have withdrawn the inhabitants of their city, saying, Let us go and serve other gods, which ye have not known; (Deuteronomy 13:13); Judg. 19:2222Now as they were making their hearts merry, behold, the men of the city, certain sons of Belial, beset the house round about, and beat at the door, and spake to the master of the house, the old man, saying, Bring forth the man that came into thine house, that we may know him. (Judges 19:22); 1 Sam. 1:1616Count not thine handmaid for a daughter of Belial: for out of the abundance of my complaint and grief have I spoken hitherto. (1 Samuel 1:16); 1 Sam. 25:17,2517Now therefore know and consider what thou wilt do; for evil is determined against our master, and against all his household: for he is such a son of Belial, that a man cannot speak to him. (1 Samuel 25:17)
25Let not my lord, I pray thee, regard this man of Belial, even Nabal: for as his name is, so is he; Nabal is his name, and folly is with him: but I thine handmaid saw not the young men of my lord, whom thou didst send. (1 Samuel 25:25)
). In the New Testament it is put in contradistinction to Christ as if it meant Satan ( 2 Cor. 6:1515And what concord hath Christ with Belial? or what part hath he that believeth with an infidel? (2 Corinthians 6:15)); it is there βελίαρ.

Strong’s Dictionary of Greek Words:

of Hebrew origin (1100); worthlessness; Belial, as an epithet of Satan
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:


Potts’ Bible Proper Names:

Worthless; without profit:―a personification of all that is bad, 2 Cor. 6:15. {Nequam}