Johann Michael Dörr, son of Georg Wilhelm Dörr and Anna Christina Stoll, was baptized 25 January 1718 in Kaichen, Hessen, Germany. He married 22 Otober 1737 in Kaichen to Anna Susanna Fauerbach. She died en route to Russia. Johann Michael and two sons arrived in Walter on 22 July 1767.
This family has been traced back to a Joachim Dörr of Erbstadt, Hessen.
Derr, Arthur C. The Descendants of Joachim (Joseph) Derr: 1620-1670 Erbstadt, Hesse, Germany .
LDS International Film #1260687.
Pleve, Igor. Derr Family Chart.
Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 296.