Hi,
I have just recently found out about a Katharine Kaltenberg in my family. She was married to Theodore Kelzenberg. They had one daughter for sure, Cecilia, who ended up marrying Peter Nagel in Cross Plains, WI around 1870. My records show that Theodore died in 1890 and Katharine died in 1891. Other than that, I have little information about this side. Do you recognize any of these names? If not, do you know of anyone who might?