Lucifer is the Latin name for the morning appearances of the planet Venus. It corresponds to the Greek names Phosphorus Φωσφόρος, "light-bringer", and Eosphorus Ἑωσφόρος, "dawn-bringer". The entity's Latin name was subsequently absorbed into Christianity as a name for the devil.
Modern scholarship generally translates the term in the relevant Bible passage (Isaiah 14:12), where the Greek Septuagint reads ὁ ἑωσφόρος ὁ πρωὶ, as "morning star" or "shining one" rather than as a proper noun, Lucifer, as found in the Latin Vulgate. The word "Lucifer" appears in The Second Epistle of Peter (2 Peter 1:19) in the Latin Vulgate to refer to Jesus. The word "Lucifer" is also used in the Latin version of Exsultet, the Easter proclamation.
As a name for the Devil in Christian theology, the more common meaning in English, "Lucifer" is the rendering of the Hebrew word hêlēl, (pronunciation: hay-lale) in Isaiah given in the King James Version of the Bible. The translators of this version took the word from the Latin Vulgate, which translated הֵילֵל by the Latin word lucifer (uncapitalized), meaning "the morning star", "the planet Venus", or, as an adjective, "light-bringing".
As a name for the planet in its morning aspect, "Lucifer" (Light-Bringer) is a proper noun and is capitalized in English. In Greco-Roman civilization, it was often personified and considered a god and in some versions considered a son of Aurora (the Dawn). A similar name used by the Roman poet Catullus for the planet in its evening aspect is "Noctifer" (Night-Bringer).
In Roman folklore, Lucifer ("light-bringer" in Latin) was the name of the planet Venus, though it was often personified as a male figure bearing a torch. The Greek name for this planet was variously Phosphoros (also meaning "light-bringer") or Heosphoros (meaning "dawn-bringer"). Lucifer was said to be "the fabled son of Aurora and Cephalus, and father of Ceyx". He was often presented in poetry as heralding the dawn.The Latin word corresponding to Greek Phosphoros is Lucifer.