Oh yeah, forgot about that!

[url=http://megamitensei.wikia.com/wiki/List_of_Shin_Megami_Tensei_IV_Demons]

We'll be using the SMT IV list, as that game has the most demons of any game according to what I've read. 

I forgot to mention something about the more special demons such as the national defense divinities. If you're going to use them, provide a brief description of how you got their medium (required for summoning).