my grandfather Karl Zimmer had a brother named Max Zimmer. Both lived in Berlin, Germany. Max immigrated 1911 to the US and lived then in Algonquin, IL. He was married to Pauline Zimmer (maiden name not known). They had a daughter named Mildred Zimmer.
Mildred changed the name to Mildred Divis when she married Charles Divis (not exactly shure about Charles).