I am seeking information on my Rockstroh line. The line has been traced back to the 1600's. The last Rockstroh I have fairly complete information on is Peter Rockstroh born 1 June 1703 in Dorflas, Bavaria. I have very limited information on his father, Nikolaus, his grandfather, Simon and his great grandfather David Rockstroh, all born in Dorflas. Any information on this line would be greatly appreciated.