1. Most likely Polish.
2. Also with Polish people.
3. Also Polish as about nationality.
I see it from scans (records) at http://basia famula.pl/en/ when I am searching my ancestry from Wielkopolska. Polish man married Polish woman. There I found only one non-Polish surname maybe from my ancestors, Salamon, maybe Jew? And von Sowinska - but that "von" added, I think, in order to germanize Polish people in that area. When Polish people remain Rzymsko katolicy (Rome catholics), they speak Polish language and marriage between themselves.