Lucifer is a name that appears in the Latin Vulgate translation of the Bible, specifically in Isaiah 14:12. In the original Hebrew text, the word "helel" is used, which means "shining one" or "morning star." It was later interpreted as a proper name, Lucifer, and became associated with the fallen angel.
Beelzebub is a name derived from the Philistine god Baʿal Zebub, which literally translates to "Lord of the Flies." In the New Testament, Beelzebub is mentioned as a term used by the Pharisees to accuse Jesus of performing miracles through demonic power.
It's important to note that the existence and nature of Satan, Lucifer, and Beelzebub are theological concepts and are interpreted differently by various religious beliefs. These names have taken on different meanings and interpretations throughout history, depending on the context and belief systems.