There is documentation that Hans Adam Biebel married Maria Eva Muller located on "The Family Bible" website:http://www.rootsweb.com/~bible/http://www.rootsweb.com/~bible/
This documentation comes from the Archives du Bas-Rhin in France by Monsieur Daniel Peter, professional archivest. The scan of the documents are also located at "The Family Bible" website, but are written in an old German dialect.
In Annette K. Burgert's "Eighteenth Century Emigrants from the Northern Alsace to America" states:
"Adam Biebel, single son of Hans Georg Biebel, m. 19 Nov 1748 at Gorschdorff, Maria Eva Muller, eldest daughter of Otto Philipp Muller, the miller at the Gorschdorffer Mill. They had a son, b. 22 Apr 1749, named Johann Georg who died the same year."