A name for Satan that began as a description of the planet Venus.
Documented
A taunt aimed at a Babylonian king
Isaiah 14 mocks a king of Babylon as "helel ben shachar," shining one, son of dawn, meaning the planet Venus rising proud then vanishing. When Jerome translated the Bible into Latin, he rendered it "lucifer," the ordinary Roman name for the morning star. Centuries later, Christians fused the passage with the fall of Satan, and a translation became a name.
Assessment: Fully documented in the history of the text. Lucifer was never the Devil's name in the original Hebrew.
Stories
The fallen light-bearer
The fused reading became powerful theology: the brightest angel, bearer of light, falling through pride. It shaped Dante, Milton, and the entire Western image of the Devil.
Assessment: As theology, influential and sincere. As exegesis of Isaiah, a later overlay.
Interesting claims
The hidden sun cult
Occult and conspiracy readings claim the morning star link proves Christianity conceals ancient Venus and sun worship, and that prayers and greetings secretly address the star.
Assessment: Venus was genuinely sacred across Mesopotamia, and symbols do migrate. But the chain from that fact to secret star worship in daily greetings has no documentary links.
Sources and further reading
Isaiah 14:12, helel ben-shachar
Vulgate Isaiah 14:12, lucifer qui mane oriebaris
2 Peter 1:19, phosphoros
Worth asking
If the Devil's name is a translation accident, how many of our certainties are built on accidents we never checked?