OK, this may sound weird but I swear in one of the books there was a list of 4e deities updated to 5e. It was in one of the main 3 books. However I cannot for the life of me find it now. Did I just dream it or something?
I was about to point you to the the appendix in the Player's Handbook that lists the gods for a few settings, but I looked it up to confirm and realized I'm wrong