User blog comment:TimFromLA/Religion and Supernatural/@comment-4920092-20130309170318/@comment-4920092-20130310025724

No. Your understanding is incorrect. It wasn't until Milton's work "Paradise Lost" that any Christian associated "Lucifer" and "Satan." lucifer, or helel (in Hebrew), is a title - the only instance it is used, in Isaiah, the prophet gives no grammatical clues that it is meant to be a proper noun. Essentially, it's the Hebrew equivalent of NOT capitalizing a word. And most scholars agree that the passage in Isaiah refers to the Babylonian king, but it's possible to make a case that it refers to Satan. Even then, it's still a sarcastic title.

While it is true that Satan had his name changed after he fell, we never told what his name was, because he isn't the same being anymore. Unlike humans, who are totally depraved (that is, all of our faculties are affected by sin), Satan is UTTERLY depraved (he can do nothing but sin). There is no longer any resemblance to the servant of YHWH he used to be. So while God sees fit to tell us Abraham used to Abram, for example, because when a human converts, the conversion is not complete until death, God does not see fit to tell us Satan's previous name because there is nothing of the former angel left alive in Satan.