Andy Krupa of Chicago Illinois

I'm searching for the Krupa family from Chicago and going back to Przedacs poland. My dad, John Krupa left Poland in 1921 came to Chicago met and married Lillian Rutkowski Oct, 10, 1925 They had three childern. Robert B July 21, 1927 Eileen, B June 11, 1929, ANDREW b May 19, 1934.Lillian's Mother was Petronella Sokoloski B Apr 11, 1904, Her Husband was Frank Rutkowski. They had 4 Children. Bernard b Aug 03-1906, Lillian, Frank B-Oct-06-1908 and Walter b (unknown) Died in an accident with a Yellow cab in Chi. in 1925 I can find no onfo for Petronella's parents, or info on Frank Rutkowski Sr. And if anyone has any imfo going further back on any of the above I would appreciate your help.