Someone in the sea of posts mentioned en.wikipedia.org/wiki/Wendland
and that sent me in a minor facts excursion. I wasn't aware there was a place called Wendland.
I had known that Swedish kings before the current one were styled "King of Svear, Goths and Wends", and I knew that Wends were supposed to be some people on the south coast of the Baltic.
I had always thought this had some connection to en.wikipedia.org/wiki/Swedish_…
but now I learned that the geography isn't entirely right: Wendland is south of Hamburg, not at the coast. Also, the first Swedish king "of the Wends" was enwp.org/Gustav_I_of_Sweden
and Swedish Pomerania wasn't Swedish until after the Thirty Years' wars, a century after Gustav I.
Turns out, the term "Wends" was archaic already in the 1500s, but Danish kings had taken the title "King of the Wends" since they conquered Mecklenburg in the 1100s. Gustav took the title just to stick it to the Dane.