I was aware of this family but I have never been able to connect them to my Zwierzchowski family. When I went to hunt for birth certificates the misspellings were all over the map. In addition some of my famly members shortened it. Some have used Zwerk and some Rynski (don't ask me how they came up with that). As far as pronunciation I try to do it phonetically Zwerz-chow-ski - but I have no idea if that is correct.