Patrilineage for Hermann participant 374827 (Rick Hermann, )

Grandfather: George Hermann( or Hammon) ?: b. 15 June 1876, Milstadt, IL  d. 10 Sept 1940, St. Louis, MO ( Note: Certificate of Death lists both last names with Hermann shown in parenthesis. Cemetery headstone has George Hammon) Baptized in Trinity Lutheran Church

Great Grandfather: Adam Hammon, Hamann, or Hamon. Have seen it spelled all three ways.  Born; Bavaria, Germany abt 1834: died, I believe in IL but have no date. Married to Barbara ?? Lived in Milstadt, IL and attended church at Trinity Lutheran Church. I don't know when or where Adam died.