🔼The name Belial in the Bible
The word belial originally shows up in phrases such as "sons of belial" and that's why it became treated as a personal name in later texts, although it isn't a name really. It's applied to satan (Βελιαλ; 2 Corinthians 6:15, see also 2 Thessalonians 2:3), Hannah (daughter of Belial — 1 Samuel 1:16), David (2 Samuel 16:7) and a handful of others (Deuteronomy 13:13, 1 Samuel 2:12, 1 Kings 21:10).
🔼Etymology of the name Belial
The word belial comes from the root-verb בלה (bala), meaning to become old, worn out:
Because Belial is not really a Biblical name, Jones' Dictionary of Old Testament Proper Names doesn't treat it. NOBSE Study Bible Name List reads Worthless, Wicked, but wickedness is not implied by this word/name. A better rendering would be Obsolete, Beyond Purpose, Beyond Function or (a bit forced) Purposelessness.