Beelzebub is a major figure across both the Philistine and Abrahamic pantheons, best known to humans as the "Lord of the Flies"—a title that's stuck around for centuries. Among the gods, he's sometimes called "Anathema," a name that basically marks him as cursed by Satan.
He goes by plenty of other names depending on who's talking about him. The "Priest of Gluttony," the "Ruler of Evil Spirits," and the "God of Darkness" are all titles tied to him, and the Canaanites worshipped him as "Baal-Zebul." Each name captures different aspects of how various cultures and traditions understood his role and nature.
Content compiled by AnimeList.moe from publicly available sources.