According to the Judeo-Christian there is only one true devil, whose name is Satan. A devil is a thing, whereas Satan is a name. As for Lucifer, this became an associated name of Satan because of the misunderstanding Anneza explained. Venus, along with all the other planets, use to be thought to simply be other stars, and being so bright and being seen around dawn the 'star' was named Lucifer.
So truly Lucifer and Venus are one in the same, and Lucifer isn't actually Satan/the devil or a previous angel of god.
I have heard the name Lucious used modernly, and in the movie Gladiator... I think that was the movie.
A lot of ancient religions, or religions considered to be 'pagan' have many devils/demons that represent different sins etc. and have many different names.