Does Maria Anna, older sister of King Maximilian I Joseph of Bavaria, count as a member of the royal branch? After all, her brother (not father) was the founder of the said branch, counting as the first king of Bavaria. But as a king's sister, not daughter, I'm not sure if she would have qualified as a princess ...
In any case, she married Duke Wilhelm in Bavaria, a second cousin of her father, Friedrich Michael: the two were agnates, meaning that their son, Duke Pius, was an agnatic third cousin of King Maximilian I, as well as a nephew. So in the next generation, his great-nephew, also named Maximilian Joseph, was an agnatic third cousin, once removed.
He, of course, married Princess Ludovika: the two would have been first cousins, once removed; but agnatically, they would have been fourth cousins. They became the parents of the famous Empress Elisabeth ("Sissi") of Austria.
As it was, their granddaughter, Duchess Marie Gabrielle in Bavaria, married the future Crown Prince Rupprecht.
So I'm counting three unions. Is this correct? Or does the first not count? Are there any other intermarriages between the two branches of the Wittelsbachs?
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