Konrad Zitterkopf is recorded in the 1767 census of Huck in Household No. 58, having arrived there on 1 July 1767. His birth as Johann Konrad Zitterkopf is recorded in the parish records of Breitenborn, Hesse, on 2 October 1714. His marriage is recorded there also on 19 April 1740.
Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 154.