"What does Kraan translate as?... because in Polish that would be tap/faucet."
It's a spoof spelling, just like Def Leppard or Led Zeppelin, the double A makes it look a little Dutch and Kraan weren't too far away from the Dutch border, but in German there is only "Kran" and that can mean either
- faucet or tap, just like you said (though it's an old-fashioned and more regional term for it),
or (more commonly)
- a construction crane.
Kraan have also used the term Kraaniche, which is a spoof on Kranich, the crane bird: