I noticed several of the postings related to Gentz in Wisconsin and Iowa. Perhaps some of my Genz/Gens ancestors will connect with yours.
My gggg grandparents, Peter and Christina Gens or Genz, emigrated from Prussia (near Aachen) to Grant County, Wisconsin (which is on the Iowa border). Peter died in 1860 and Christina in 1859 and they are buried in St. Andrews Chruch in Potosi, Wisconsin. I am descended from a daughter Barbara who married a man named Jacob Muller. They were married in Tondorf, Prussia in 1813.
If anyone sees a connection, I would love to swap notes.