I did send a query to a local geneology society where they settled in the USA to see if there is an info on origins in any early documents. It looks like official records not kept until about 1880s, so there is a timeframe there were official records were not kept. Maybe there is a baptismal record or a local history book they know about. If nothing else, it may give me a good reason to go back to the Iowa City, Iowa area and look for myself.
I wish I would have started this research when I lived there, I lived literally 2 blocks from Czech & Slovak village and musesum in Cedar Rapids and probably about 35 miles from where the Simitzs settled.