This is the first time I've read anything in English about Kärnten and Steiermark. Styria and Carinthia are impressive names. It's as if the Roman Empire were still there.
Considering, both, that most of the austrian states are the successors of duchies that existed already more than 500 years ago in the HRE, and that their governors today are also jokingly called „princes“, your idea is not that far fetched.