There is one simple solution to this grievous shortage, it is how I got Hai-Etlik. Just find an obscure mythology (not Greek or Roman) and pick a random name from it, don't automatically go for the sun god, sky god, god of war, or god of the underworld unless it is really obscure, conversely a very obscure character from a more well known mythology can sometimes work as well. For instance Hai-Etlik the Lightning Snake is a prominent (part of the creation myth if I remember correctly) part of Nitka mythology, I have NEVER found anyone else using it as a nickname, and the only reference I have seen at all on the internet is that the Scouts Canada Vancouver Island Region uses him for their logo.