I have answered my own question regarding which Denig daughter married Henry Byerly. In the Ludwig Denig Picture Bible Vol. II are original copies of his Bible with the births and baptisms of all his children. For his eldest daughter Magdalena born 11 December 1781 he has also added her marriage February 1801 to Mr. Henrich Beyerly. All in German and in smaller writing I had missed this earlier. This was the only marriage he wrote in for any of his children.