A surname forum devoted to these Swiss families has recently been created on Genforum and I have just posted a number of messages. The families come from the Prättigau valley (Fideris, Jenaz, St. Antönien, Schuders, Schiers) in Graubünden. A number settled in Sauk County, Wisconsin, from the 1840s onwards. Some settled in Iowa. Others undoubtedly elsewhere. The URL is http://genforum.genealogy.com/tarnutzer/ Regards, Mike Hobart