I had a slight breakthrough on the Engman family. I found Wendelin Engmann on the 1860 census for Galena, Jo Daviss County, IL. He was listsed as "Wendal Ingman" & wife "Magdeline". Interestingly Wendal's occupation is listed as Deck Hand (steam boat?). Despite their young ages: Wendal 23 (should be 33 I think) and Magdeline 20, there doesn't appear to be any other Ingman, Engman or Klier's living in the area so I think they were pretty much on their own at an early age.