Bade was politically very close to Franceand was dependant after 1806 from French Empire (Napoléeon 1st).
It should have follwed the law edicted the 20 of July requiring that all jews take a family name and be identified by First name -Family name and more with XXX ben (or bath) YYY. That leeds to funny things (greek names like Aristide, all the jews from a village taking the same family name etc.)
For more infos in French, look at http://judaisme.sdv.fr/genealog/memoire/memoir3.htm
Jean-Pierre Lambert, president of the jewish society for historical studies, Alsace and Lorraine.