I'm sorry I don't have any information on you particular Beyersdorfer, but I just thought I'd let you know you're not alone in this name group. Our Beyersdoerfer (note the spelling - I even know a man from Germany who spells his Bayersdorfer) group is from the northern Kentucky, Ohio area. So far none of the other researchers I know have found any Beyersdoerfer's in the U.S. prior to 1850. Infact, we now know they came from the Paletinate region of Bavaria. There were several different cousins who came over in the 1850's who all trace their lineage back to a Peter Beyersdoerfer from the 1600's. I know my G-G-Great grandfather was one of these, I just yet have to prove it. Uggghhhh!