Belial In early Christian writings, Belial was identified first with an angel of confusion and lust, created after Lucifer. Paradoxically, some apocrypha credit Belial as being the father of Lucifer and the angel that convinced him to wage a rebellion in Heaven against God, and that Belial was the first of the fallen angels to be expelled. Quoted from Wikipedia, Belial.
In Rabbinical, which is old Jewish religious text and Apocryphal writings, the names of Satan (Adversary) are many. Just as “his” forms are different, so is the source of him, remember that The Adversary is both of darkness and light and uses elements of both in accordance with his Will.
BELIAL as the name of the Adversary in recent times been considered different from Satan, old grimoire texts mention Belial was the angel created after Lucifer. Belial is considered by Hebrew texts to be the father of idolatrous nations, which if you relate the context of the early Rabbinical writings on Cain, his “founding of a city” is related to “founding a belief system”. As Belial appeared in the Old Testament, his name has been explained by numerous etymological studies as meaning “wicked” but also one who is the opposer of established authorities. Belial was suggested as meaning in Samuel as the rivers of the underworld, then as a force than a specific person.