The GG grandparents of mine, the Iowa clan, only had one child together. George. Who was born in Clayton county Iowa around 1856-57. Wilhellm was married 3 times, with Elizabeth being the 2nd spouse. I think the birth records of George as well as the death records of Elizabeth are held by the Catholic Church in Guttenburg Iowa. But I have had no luck with them nor the Archdiocese in Debuke Iowa.
Later on Wilhelm, George and Sophia ( the 3rd spouse) end up in Winnesheik Co Iowa, after a brief stay in Cincinnati Ohio. Wilhelm and Sophia are buried in Festina Iowa. George moves to Oklahoma and is buried in Canute Oklahoma.
Kind of a quick synopsis. I have a lot more info, but cannot tie all the loose ends, especially anout Elizabeth(as a guarantee) being George's mom.