Board Thread:Castlevania Wiki General Discussion/@comment-1395837-20140904135704/@comment-3236835-20140906172926

Devil Castle sounds more accurate to me. Although I'm more used to seeing it written as Demon Castle. I think both names are correct, as "The Devil" is normally used to refer to Lucifer (or Satan), even though there are other lesser devils, as a race.

The same happens with "The Demon". It depends on how it is used in a sentence to know if one is referring to Lucifer or to a lesser demon.

Imagining what the creators had in mind when they named the series, I think that Devil Castle should stay, as it's the most common term used to refer to Satan. Although I must admit that Demon Castle has a better ring to my ears.