Beelzebul

noun

1. Bible the chief devil; Satan
   also Beelzebul
2. in Milton's Paradise Lost, Satan's chief lieutenant among the fallen angels

Origin: LL(Ec) < Gr(Ec) Beelzeboub < Heb baal-zevuv, lit., god of flies < baal (see Baal) + zevuv, a fly: prob. deliberate pejorative alteration < Baʼal zebul; cf. Ugaritic zbl bʿl ʾrs, the exalted one, the lord of the earth