Searching for Mix of Wisconsin

William Mix came to the US in the 1870's. He and his family migrated here from Germany. He and his wife were naturalized in 1878.
Trying to find more information on this family.
Herman Mix was his son. Born 1875. Do not know if he has siblings or not. Herman had several children. Can only recall a couple at this time. Rudolph, Edna, Nora. Herman had a farm in Bangor. Herman Mix's wife name Emma Bertha Lena Shelmidine...
So anything with the SHELMIDINE name, as well as MIX will be helpful in further searches.