The fantasy idea looks pretty grim, with all those plagues and monstes released from the box, and an evil ruler with unlimited magic power. And with the power of old gods in the hands of the players this could turn into something like a fantasy superheroes game. Any idea what ... "power level" you imagine tis game might have?
But if people like the idea, then I will probably need to make up different names for these gods and goddesses...though I don't know if keeping their original names would be such a bad idea.
I guess you could get away with using real-world names, but if not, here are some suggestions (I took those from a German pen & paper RP):
Arabic/Egyptian: Satis, Kebechet, Serkef, Chepru, Pachet, Rehotep, Heket, Sutech, Nepthut
Nordic: Asvargr, Fjörgynn, Helja, Sigrun, Vidar, Wyrd
Asian: TsaiChen, WenCheng, WeTo, WuKung, KuTuh, PadKu, YenLen