Looking for any information about Mueller family (or families) that settled around Richfield and Germantown, Washington county, WI. Michael Müller and Susanna Caspar , along with their children immigrated from Germany (Simmern near Koblentz) in 1848 . Later (about 1870) they moved onward to Chicago. Trying to determine of Michael and Susanna had brothers or sisters that may have immigrated about the same time with their families as census shows several other Mueller families arriving about the same time to the same general region. Any informaiton or suggestions would be appreciated.