@Razqua - Yeah, they do exist, though like you I'm not that clued up on them.  Here's a wiki page about the DC version of [url=http://en.wikipedia.org/wiki/Hell_%28DC_Comics%29]Hell[/url] and one linked to the DC Database for [url=http://dc.wikia.com/wiki/Category:Demons]demons[/url].  Hope that helps.