Jan Bankowski had four wives.
Married Agnes Stellmach in chicago July 14, 1902 and had 8 children. Sophie Bankowski was one of those children who married Joz(s)ef Rzeszut. She had 6 children with Josef.

Second Wife had 4 children.
Third wife had 8 children.
Fourth Wife was Maria Korzempa and had 8 children.

Any takers?