Hi Jim and all are interessted at the Dotterweichs,
my name is Christian Dotterweich. I am from Germany and I am working as a Journalist. I live in a town called Forchheim near Nürnberg in Bavaria. I came across these sites.
I have also searched for my ancestors. The Dotterweichs are all from the Oberfanken area of Bavaria. I found my ancestors in a small village called Reundorf. The other Dotterweichs lived in villages called Herrnsdorf, Vorra, Obergreuth, Untergreuth, Abtsdorf and Frensdorf. They are all near by the old town Bamberg.
Here are some of the oldest found Dotterweichs: 1575, Cunz Dotterweich, Reundorf 1576, Hans Dotterweich, Abtsdorf 1588, Cunz Dotterweich, Frensdorf 1588, Cunz Dotterweich, Obergreuth 1588, Hans Dotterweich, Reundorf 1588 Fritz Dotterweich, Untergreuth 1588, Georg Dotterweich, Untergreuth
And at last the Homepage from the German Prof. Dr. Markus Dotterweich. The sites are in German but there is a detailed description to the Dotterweichs: