My Dad just told me about visiting several times with the Thram & Grenewalt families in Sanborn & Windhom, Minnesota as a young man. We are not sure if they are cousins on the Gustav Emil Rose or Johanna Louise Ehrenberg side of the family, (who came to the US about 1884 from Germany). Please contact me and I will try searching census records and such at the library in Omaha. He also said that August Hinze of Hamburg, Iowa was a cousin, but I have not been able to find that connection either.