I think you misunderstood ( or maybe I did...) but I think they said no to having an unrelated and new character (which was Godbrand) named Mathias Cronquivist.
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Yea you misunderstood dude, I completely understood that, hence this part of my post,
As it stands now my only conclusion is that maybe they wanted the anime team to keep the "door open" for the origin of this version of Dracula and thus having the writer throw away the name to a completely different character may have not been a wise move in Konami's eyes.
Namely the part of my post about Konami not possibly wanting them to use Mathias Cronqvist on a completely different character (aka Godbrand) and why it may have not been a seen as a wise move on their part hence them blocking it.
So in short yes no misunderstanding here my main point was speculation on WHY they would not want them to waste that name on Godbrand.