The clan McDuck is my favourite instance in Disney comics. I have read every single story conserning clan McDuck. And all the work Don Rosa has done to even more deepen the history of McDucks is amazing. The treasure of the Templars! For god sake! As a crusader history fan I just love that!

And all the work with heraldry. For example the description of the crest of McDucks is great! You can find it on the same page MacMullen posted. There is only one mistake in the history. And it could have been seen in the last part of the full story of life of Scrooge McDuck. It is related to the clan tartan... Can you find it!?