Oh, ok. I think it is/was used in the US, though isn't common (I was looking at ancestry.com, and it said there were 9,000 records, and probably originated from a NN). I wouldn't be surprised if it was a variation of something like Czarny or Czarkowski or Czarnecki (in which case it'd probably be derived from black?). It was common for immigrants to simplify or anglicize surnames.
~ song of the week: "Little Sparrow"
https://youtu.be/JB9zXoOBpOIThis message was edited 12/6/2021, 11:14 AM