Because it‘s a small noble European world full of Germans in the 18th century, I just discovered some more cool connections.
In addition to Petronella, Melusine had a younger daughter named Margarethe Gertrud. This daughter was raised by MT‘s father the Emperor into the Reichsgrafenstand - made a countess of the Empire - so she could marry Albrecht Wolfgang Graf zu Schaumburg-Lippe (despite being a bastard). Alas, she did not grow very old, and he married again. He also had a very famous mistress - the Countess Bentinck, mother of his illegitimate son Charles. She befriended Voltaire, helped beta-reading the Anti-Machiavel and getting it into print, and later showed up in Berlin on Voltaire‘s advice in order to secure Fritz‘ support for regaining her inheritance from her husband. This, as we know, failed as did her efforts to seduce Heinrich, but she provided the court with a lot of lively gossip by her free-spirited carryings on. (And Lehndorff went from scandalized disapproval to befriending her and climbing on top of the Charlottenburg Palace with her.)
Re: Katte family trees
In addition to Petronella, Melusine had a younger daughter named Margarethe Gertrud. This daughter was raised by MT‘s father the Emperor into the Reichsgrafenstand - made a countess of the Empire - so she could marry
Albrecht Wolfgang Graf zu Schaumburg-Lippe (despite being a bastard). Alas, she did not grow very old, and he married again. He also had a very famous mistress - the Countess Bentinck, mother of his illegitimate son Charles. She befriended Voltaire, helped beta-reading the Anti-Machiavel and getting it into print, and later showed up in Berlin on Voltaire‘s advice in order to secure Fritz‘ support for regaining her inheritance from her husband. This, as we know, failed as did her efforts to seduce Heinrich, but she provided the court with a lot of lively gossip by her free-spirited carryings on. (And Lehndorff went from scandalized disapproval to befriending her and climbing on top of the Charlottenburg Palace with her.)