Board Thread:Bible Questions/@comment-26538658-20170303001331/@comment-27358554-20170303213148

Here is a quote from Satan that contains the answer: {{quote|

Etymology
The name Satan is the Hebrew word for "opponent." This was the preferred name by the Pharisees in the first century. Once in the Old Testament, Satan is called "Helel" (Latin: Lucifer, meaning "light bearer") which literally means "Shining One." This name is interpreted "Son of [the] Dawn" or "Son of the Morning" in many translations.

In modern times he is most often called "the Devil," which is a translation of the Greek term "Diabolos," meaning "traducer." ...

Verses
}} I underlined the most important information. Also read this Wikipedia article on the history behind the name.