Well, this isn´t proper trivia in a strict sense of the word, but I hope someone enjoys a small history test. And I think this might be interesting regarding the history of Haddock family.
labrador road 26 wrote an excellent post here:
https://www.tintinologist.org/forums/index.php?action=vthread&forum=1&t opic=796&page=2 (the very last post of the thread), although I have to disagree with him on one point, namely the location of Moulinsart.
The question is in two parts: First, please explain why it´s possible that Moulinsart is in Belgium, even if it was a gift from Louis XIV? And secondly (in no direct relation to the post mentioned above), is it possible to deduce the nationality of Francois Haddoque from the premise that he served in the French navy?
Please answer short(ish)ly, some fifty words should be more than enough to answer both of the questions.
Hopefully this is clear enough, I will give some hints if needed.