I know this question has been asked before, but I'm curious. Where DOES the name 'Okumura' come from?
It's not from Shiro Fujimoto, that much is obvious. And if their mother is called Yuri Egin, it's not hers either. I also don't see Satan calling himself that (and even if he did, can you say 'dead giveaway'?).
Two possibilities remain:
- It's the name of the mysterious possessed human dad;
- Shiro/Mephisto made stuff up.
The idea of them having their father's name is interesting, but that would only work if the name is really common. Also, it's kinda strange the twins would never have asked about this.
As for the meaning,
according to Chino:
Okumura 奥村
oku = something deep and mysterious
mura = village
the two together ... = nothing (that's just a name)
So that doesn't really help us further either. Unless we're going to assume he found them in a mysterious village...