Well I'm into Greek myth and all that and I've done a lot of reading on Greek gods and their relation to the Roman ones. It would be interesting to have something similar to that situation though it might go a bit overboard if you take into account all the minor gods.
Janus (Roman god of beginnings and transitions) could be an interesting one to modify to fit into the Eternity world.
Also, to have possibly animal counterparts (or gods taking the form of animals themselves) may be something to look into. It could affect the way animals in the world react to your party.
