According to Cox, Richter is not the name of the LoS2 Belmont. I think Julius is number 1 now (was he already?).
Well, MS could be jerks and use the names of Leon, Sonia, Christopher, Desmond, Zoe, Delores, Juste, or one of those other guys. XD
Or the second option is that there is a whole new Belmont.
Or the third option is Alucard really is Trevor, thus making him indeed the Belmont.
Wouldn't rule out Julius, though, and that would be really cool.