I am writing for NanoWrimo (self isolating continues!) this year and was going to throw in it some Junkers and other minor nobles.

While the time period I am planning on diverging the noble lines from is from far enough back that I do not think making up nobles would be a problem, I was still wanting to make sure that I do not offend anyone by chance and do something like make up a name and it be an actual person with a still living line that is mostly avoiding media coverage and make them angry. Like the Hapsburgs; can't use any direct Hapsburgs unless moderately accurate because they are still a family with far more political and financial pull than I want to accidently tread on. I mean, I don't think the Prussian/Junker and associated nobles' trait I was going exploit is that bad; my story plan is to have the highest ranking present Noble of an alien-knapped village and totally not invading 'we got lost, honest' Prussian army regiment declare that this now free colony on an alien planet is a new duchy of the Kingdom of Prussia, of which they were now the duke of because there is no law that says they couldn't declare a new duchy on an alien planet. I was hoping someone might know a good couple of books or web pages that have information of lines that went extinct since those are safe. Or is making up a name and google searching to see if someone pops up the better way to do it?

The other thing I wanted to double check on is this; in this time frame the Czech republic and Slovakia were apart of the Austrian Empire as bohemia and northern Hungary(?). Were the German populations in this area the "Austrians" and would have had the more favorable treatment? Or were there local Czech, Slavic, or Hungarian nobles and upper class that would have been considered higher social standing? or would the Hungarian revolution of 1848 flipped how things would have been prior to that? Are there any good, concise books or articles available that would have more details?