Indeed I knew that the Wurtemberg Corps joined the larger Austrian and others german states Army so I had the same idea, that he could be Austrian, and due to the name also

...but, but, but...it is the specifically reserved area for the Wurtemberg ocupied zone/sector (more exactly Prince Adam's Cavalry Division, General-Major Von Hügel's Infantry Brigade) so Austrians had nothing to do here normally...
until now I have found only Wurtemberg officers and Infantry & Cavalry Regiments

I realize there is no military rank indicated despite he was "commander of the place" I wonder if he was not some Intendant or Commissary, something like that,
at other dates Hügel himself is indicated instead of this curious "commander of the place"