sjodl_
The node used source:name=PRNG. Per the PRNG layer in Geoportal it does indeed use Kolończyk. Nevertheless, all sources I found online with the exception of some small mountaining blog use Klończyk.

I spoke with a local and he confirmed the shorter Klończyk is the one in use, so I went ahead and changed it. I left Kolończyk as alt_name.

nfar