On the "Baal of flies" see Beelzebub.
The distinction of good and bad angels is recognized; we have names, Gabriel 4, and the evil angels Abaddon or Apollyon', Beelzebub 6, and Satan'; ranks are implied, archangels 8, principalities and powers9, thrones and dominions 10.
After He had cast out a dumb demon, some said that His power was due to Beelzebub.
There is no trace of Beelzebul or Beelzebub outside of the Biblical passages mentioned, and the literature dependent on them.
In Paradise Lost, Book ii., Beelzebub appears as second only to Satan himself.