Hi Josh. It seems your ancestors were from surroundings of Wayer town in Domazlice area southwest Bohemia. I have in my file lot of families Rothmeier, Sellner and Saffert from this area who emigrated to Minnesota and settled down near New Ulm.
Josef Saffert born 1859 in Pfaffenberg, wife Barbara Pechtl, children: Joseph, Margaretha, Maria, Georg, Wilhelmine, Heinrich and Johann emigrated to New Ulm.
Do you need some research in Bohemian archives?
All the best. Tony.