The mere mention of Lucifer often strikes dread in the hearts of believers while arousing the scent of searing sulfur and eternal punishment. “He” is seemingly forever synonymous with Satan; although the two terms are not entirely equivalent to each other. Etymology is necessary to unravel the historicity of how the word “Lucifer” became adopted by early Christians.
Lucifer is derived from the Latin phrase “lucem ferre,” which means “bearer of light.” The 4th century Vulgate is a Latin translation of the Hebrew bible (its authorizer was Pope Damasus I) and there you will find that “Lucifer” translates literally to “son of the morning,” or “the planet Venus.”  The Hebrew word hêlêl—that the Vulgate deems as “Lucifer” in Isaiah 14:12—does not represent an all-pervading corporeal creature with cruel powers to possess and seduce souls. The Septuagint, a 2nd century BCE Greek translation of the Hebrew Bible, also represents hêlêl as meaning “Day Star,” which is another fancy term for Venus. 
Ironically, modern versions of the Bible refer to Jesus with the infamous “morning star” title (New Living Translation, King James Bible, Jubilee Bible 2000, English Revised Version, etc.):
Revelation 22:16 – “I, Jesus, have sent My angel to testify to you these things for the churches. I am the root and the descendant of David, the bright morning star.”
Matthew 2:2 – “Where is the one who has been born king of the Jews? We saw his star when it rose and have come to worship him”
Revelation 2:28 – “I will also give him the morning star.”