I know your question was directed to someone in particular, whose ancestor profile you believe you are connected with, just thought I'd share this info with you.
If you try www.familysearch.org and enter Hans Kuhn as your deceased relative with Barbara as his spouse, it will pull up a number of records. Some go back to the 1500's. Take a look and see if any of the records there help you in your search. Have a good night.