You should try to locate Onufry's arrival manifest.

Hnatink, Osyf Piadyhi 39 1867 1906 Arriving NY EIlis Island and going to Philadelphia, PA.
...cemeniuk, ... Piatyki 24 1882 1906 [going to Philadelphia, PA]
Czeredatczuk, Mikolaj Piadyki, Austria 41 1868 1909
Czeredavczuk, Basyl Piadyki 19 1888 1907
Czeredavczuk, Peter Piadyki 43 1864 1907
Czeredarozuk, Mikolaj Piedyko 40 1867 1907

http://www.infoukes.com/genealogy/
You might want to read this
http://www.infoukes.com/genealogy/tracz/baba.html