Latin translation (followed by the KJV) of the Hebrews word for “day star” in Isa 14:12, where the word is used as a title for the king of Babylon, who had exalted himself as a god. The
prophet taunted the king by calling him “son of the dawn” (NIV, NASB), a play on a Hebrew term that could refer to a pagan god but normally indicated the light that appeared briefly before dawn. A later tradition associated the word with evil, although the Bible does not use it as such
Isaiah 14:12 – 12 How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!