I thought I probably knew all these, but am terribly stuck, here. You know that feeling you get, when you've apparently got off to a good and easy start, but the remaining letters just aren't conducive to any further progress?
8 / ZEUS / 6 / ARES / HEPHAESTOS (remaining letters YMOSSOUDRIEIDN)
7 / JUPITER / 7 / MARS / VULCAN (remaining letters TERECEUNUMNAUC)
So, "Dionysus"/"Dionysos" comes easily out of the remaining Greek letters, but Bacchus is nowhere to be found (and there was never a B in the first place), and so on.
I see that Ares/Mars might be Hera/Juno, but don't see that this will help ...