I was very surprised to see your post. I was originally looking for Kozaczka, but I do know some Sojas, who live in Chicopee, MA. If you are interested I can contact them for you as they are my cousins.
Back to Kozaczka, though. My great-grandfather was Pawel Kozaczka from Dabrowa, Poland. The interesting thing is that the Cwikow that you refer to is the next town over from Dabrowa. Pawel's father was Michal Kozaczka, who died after 1910 in Poland. Michal did have a brother, Piotr born 1877. I know it is a long way back, but do you have any other information? I have more information on Pawel, Michal and Piotr, and some on their family. It just seems like a big coincidence!!
Hopefully we can find a connection! Thanks for your time.
-Kim Bolduc