SEBASTIAN HAFNER, Northhampton Cnty,PA

I am looking for information on the parents etc., of Sebastian Hafner b.in Germany and married to a Wilhelmine Schellinger in Sauldorf Germany. They came to U.S.A. and settled in Bethlehem,Northhampton County PA.
The only children I know are Frank, who married Elsa Kassner, and Richard Henry who married Elizabeth Jentricks. Any information would be appreciated.