I'm German myelf and I do have to admit those German names look a bit out of place.
But I actually like it. As I fully understand them, I immediately can associate some context to each of these names.
Having that said, all of the names are actually suitable.
I was actually laughing when I read the name
Genau (Precise/Accurate). You immediatly know this proctor is properly suited for his job 😀
Also Übel and her omnipresent (and somewhat creepy) smirking is a very promising character. I'm really looking forward to her.
@SirBecks
Here are some more:
Äußerst - extremely, but in this case (the town)
most external make more sense
Granat - garnet
Strahl - radiancy, beam, ray