"Beelzebul" is a reconstructed form of the word baal-zebul, which corresponds to the meaning of the word זבול "zevul," i.e., "exalted ruler.
"Beelzebub" is a symbol of "the Sovereign," the deity, the idol, the idol of the sinful world, before whom man worships.
"Beelzebub" is a symbol of materialism, wealth, fame, pride, which rule over the minds and lives of sinners. It is a symbol of all that is served, worshipped, and trusted by man who does not obey God's Commandments.
"Beelzebub" is also an allegorical image of evil, of a false, pagan view of God, of His Will.