Hi
My mother's side of the family are Szczepaniak, however, they shortened the name (Circa 1920) to Spaniak so you may have relatives with a shorter name.
Check my family out on the Margolis - Mariscal family tree on ancestry.com.
My great grandfather Mikolaj Szczepaniak (also know as Michael or Nicholas) and his wife Apolonia had at least seven children: John, Tekla, Hillary, Cecelia, Katherin, Frank and Theodore. Tekla married Paul Malionek and lived in the Salem Mass area and had 14 or 15 children.