I think they are my step great grandparents. I known Emelia Lerke marriage my grandfather August Arigo in January 19, 1926 in Council Bluffs IA. Emelia was born on October 4, 1905 in Fak Field. On the marriage record it just have the father name R.M. Lerke and not mother name. In the 1915 census they are in South Dakota but she isn't with them until 1920. I think they are Germany.