Who is Beelzebub, Leader of the demons?
The Pharisees gave the name Beelzebub to the highest of the evil spirits, i.e. the demons Jesus uses to drive out evil spirits (Mark 3:22 par, cf. Matthew 10:25). There are three ways of writing the name: Beelzebul (the majority use, also written like this outside the New Testament), Beezebul and Beelzebub. Etymology and meaning are uncertain.