Orphan Anna Margaretha Bierd (age 11) is recorded on the 1767 census of Boisroux in Household No. 56 along with the Ernst Mann family. The 1767 census does not record a relationship between the Bierd and Mann families.
The 1767 census does not record from where Anna Margaretha Bierd came.
There are no known surviving male lines of this family among the Volga German colonies.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 153.