[Gianakin_]

Well, to add to that, the 1st 2 images that came to mind when I saw Zod's symbol were the Omega (even psoted that here) and the sickle. I get why people would think "u" before "omega", but being Greek I couldn't help it. But each of those 3 interpretations so far has logic behind it, so I can't discard any one of them.