Jacob Miltenberger married Anna Maria Schmitt on 8 July 1755 in the Catholic Church of Alsheim, a village between Mainz and Worms. They had one son, Johann Georg, who was baptized on 5 October 1756 in the Alsheim church.
Jacob Miltenberger and his family emigrated to Russia and arrived in the Volga German colony of Kautz on 21 August 1767. They are recorded there in the 1767 Census in Household No. 24.
By the time of 1798 Kautz Census, son Johann Georg is living there along with his family and his mother in Household No. Kz08. A daughter of Johann Georg, Sabina Mildenberger, had moved to Brabander in 1797. She is recorded there in Household No. Bn17.
By 1834, Georg Mildenberger and his sons Heinrich and Konrad are recorded in the colony of Rothammel in Household No. 30.
- 1834 Rothammel Census (Household No. 30).
- 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): Kz08.
- Parish records of Alsheim (LDS Films No. 949094 & 949095).
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Nordost-Institut, 2001): 339.