Killian Bretthauer and his family immigrated to Russia from the German village of Sterbfritz. They settled in the Volga German colony of Walter on 25 August 1767 where they are recorded on the 1767 Census in Household No. 3. They are recorded on the 1798 Census in Walter in Household No. Wt057.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): 975.
- Müller-Marschhausen, Ernst. “Russland-Auswanderer aus dem Bergwinkel um 1766 und die Spurensuche nach ihrer Rückkehr im 20. Jahrhundert.” [Online]
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 296.