The thing about the names is that Himaruya probably just kinda made them up without that much thought and actually removed the names later on from his site which explains why you cannot find them. He probably most likely made them up more to satisfy the fans and really hasn't referred to them since. I mean, none of the newer characters have names.

I wouldn't debate too much about it anyways. The older names are too far widespread to be changed now and the fanbase has really grown since then. Too much work. Unless some official English release appears with their human names, we're not gonna get very far.