Although I do not have the exact names you are searching for I do have a Stephan family lineage dating back to the early 1700's in Kobert, Alsace-Lorraine, France and Fischback, Alsace-Lorraine, Germany. I will list some of the names here in the chance that you may find a connection.
Josef Stephan, Kobert, France Anton Stephan b. 1759 Herzog (son of Josef)m. Magdalena Bach Ludwig Stephan (son of Josef) Valentin Stephan b.1811 m.Carolina Schlick 1838 Peter Stephan Johannes Stephan 1866 leaves for US and travels from New York to Galena, Illinois where other members of the Stephan family have settled. Later, settled in Shullsburg, Wisconsin.
I have a whole booklet of info. on them if you connect with any of these names.