when you get variations in the name things can get difficult. A name ending in -man is very common in german. I have been lucky with my name, the only variation I've seen when you get to the 1500 and 1600's is Baers instead of Baars. To get into the Rhone-Alpes records you may need to go to the familysearch.org site and order the microfilm and read it in one of their family history centers.