Widow Maria Petronima Müller and her son Philipp Werner (age 5) are recorded on an appendix to the 1767 census of Katharinenstadt in Household No. 37 along with her stepchildren (Maria Regina Müller, age 13; Johann Reinhardt Müller, age 9). A note records that they relocated to the colony of Luzern in 1768.
The 1767 census records that Maria Petronima Müller came from the German village of Gau and that the Müller stepchildren came from the German region of Isenburg.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 330.