If you have looked at harry wagner's site, you will know more about the Ollermann's. Alexander Franz Ollermann was the son of Franz Alexander Ollermann. My great-grandmother, Marie Ollermann Schroeder was the sister of Franz. One of marie's daughters was named Adeline Schroeder Siems a first cousin to Alex Ollermann. And she also lived in South Dakota. The Ollermann family arrived in New York on 20 May 1867. They spent one year in Wisconsin and then came to Dodge County, Nebraska, settling between the towns of Snyder and Scribner. I have much more infromation, if you are interested.