The name Lucifer comes from the Latin - Lux + Fero - meaning "Light Bringer"

The orbit of Venus is inside the orbit of the Earth, so it always appears to be either preceding or trailing the sun and is at it's brightest either at dawn or dusk.

Because of this, the ancient Greeks and Romans considered Venus two different celestial objects, depending on whether you saw it in the morning or if you saw it in the evening. In the morning, Venus was known as "Lucifer" the light bringer.

More Info: