This week, someone posted here about Jára Cimrman, and well, let me just quote Wikipedia:

In 2005, Jára Cimrman won a public vote for the title of “The Greatest Czech” (he was subsequently disqualified due to being a fictional character).

But also, “Cimrman” is a transliteration of the German surname/word “Zimmermann” (carpenter).
So, Czech people made up a tongue-in-cheek national hero that apparently has German heritage. 😅