Lucifer

In Isaiah 14:12, the Hebrew phrase "Helel ben Shahar" is used, which translates to "Day Star, son of Dawn" or "Shining One, son of the Morning." This is the only occurrence of this name in the Bible. This is poetically describing the fall of the arrogant king of Babylon. Isaiah depicts the king as having an inflated ego, thinking himself to be above the stars of God, but he will be brought low and cast down to the realm of the dead (Isaiah 14:13-15). The Latin Vulgate later translated "Helel" as "Lucifer" which was then carried over into the King James Version, as an illustration of Satan's fall, using poetic language to portray the coming judgment.