Many thanks for your kind help and all the information. You are right, all these IL Kleinschrodt's are related. I found Wm Kleinschrodt by a Family Finder search at Genealogy.com (Census Microfilm Records: IL 1920). He seems to be also in the IL 1910 census as W. J. Kleinshrodt. Most likely the many spelling variations are the problem why William is not found. There should be also a Frank Kleinschrotd (this spelling) in the IL 1920 census (Chicago). If you have access to the 1920 census images, would you give me the full information for Burnie Kleinschrodt (and possibly for Frank Kleinschrotd)?