You listed Maria Barbara Gensel born in 1779 and her parents marrying in 1780.Just making sure.
Also, do you now where this Barbara Gensel and John Overmeyer married?(You listed a marriage date so thought I'd ask.)I noticed that there was a Samuel Gensel that lived in the same township in Pickaway Co., OH as John and Barbara Overmeyer who was also from PA.
I am descended from John and Barbara (Gensel) Overmyer - daughter Catherine (Overmyer) Waters Burt.