Descendants of Hermann Zimmermann and Gustav Zimmermann ?

I am looking for information on or for descendants of two distantrelatives who immigrated to the U.S. from Germany: #1 Hermann Zimmermann, born Nov.25, 1825 in Koeslin,Pommerania, PRUSSIA, died March 11, 1905 in Goshen, IN,married Catherine Wagoner on Apr. 6, 1860, who apparently lived in Goshen,IN and acquired real estate in Elkhart County,IN,
#2 Gustav Zimmermann, born Aug.25, 1854 inHamm/Westphalia, Prussia, died June 24, 1913 in St. Paul, MN

Any information from descendants is very much appreciated.