I really don't have a lot of information either. My grandmother - KROL- was born in Ozanna and came to the US in 1912. The other names I have are KNIAZIEWICZ, FINIOR, SZEGDA, ZELASKO, VOLKUS, KASZYCKI, RAUSA and ZIELENIECKA. They were all from Ozanna or very close to Ozanna. Some of the information before 1870 is still available - you just have to know the language or hire someone over there. You could try the Morman library.
Sorry I wasn't much help