Right? I agree with Nela––I feel like it's a silly name, like from a few nursery rhymes. And definitely sounds like a nickname.
Vojtěch also seems a little dated to me, but I guess people are using it again? But rn the names that are considered waaay more dated in the CZ are like
Rostislav, Vítěslav,
Jaromír. I don't even think anyone is naming kids
Cyril either (might be because of the holiday)