Very few Hupfaufs immigrated to the US. My great x2 grandparents, Johann "John" and Margaretha Sophia (Mathews) Hupfauf came to America in the 1850s with their 4 children and settled first in Jefferson County, Wisconsin and later moving to Calumet and Outagamie Counties also in Wisconsin. Other family has documented Margaretha's maiden name and that she is from Kirchenlanglig but these facts are not sourced. There is some slight evidence that there might be a connection with the Bauernfeind Family. Also, in the 1880 US Census, an Uncle Paulus Siller lived with them. I know a great deal about the Hupfauf and Bauernfeind descendants in America. I know nothing about where they came from or who their family is ... I also know nothing about Paulus Siller or family.