Anna Dorothea Bolender's birth year is based on the age she gave to census takers in 1798. With a birth year of 1765, she should appear in the 1767 and 1775 censuses. Neither she nor her parents are included in those censuses, so they most likely went to another village first, before settling in Grimm.
Her brother's wife was from Bauer, so that may be a clue as to where the family first lived.
Child #1 Friedrich Tumler [Dumler?] should be Dumler, age 35
Wife of Child #1 Anna Dorothea Bolender
Grandchild #1 Johann Georg Dumler, age 9
Grandchild #2 Johann Jakob Dumler, age 1
Grandchild #3 Anna Barbara Dumler, age 11
Grandchild #4 Elisabeth Dumler, age 8
Grandchild #5 Anna Katharina Dumler, age 4
The couple may have had additional daughters between 1799 and 1815. These daughters were born and married between censuses: born after the 1798 census and married before the 1834 census. This means they were never identified in a census with their birth parents. Any daughters will show up in the 1834 census as living with their husbands' families, with their last name at birth unknown. There is no way to match them to their birth families solely with census records.
Anna Dorothea is not listed in the 1834 census and most likely passed away at some point prior to that year.
If she survived, she would have been 68 years old.
Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767, Band 2, Herausgegeben von Alfred Eisfeld under Mitarbeit von Sabine Eichwald, Published by the Nordost-Instsitut - 38085 Göttingen, 200.
↑The 1775 and 1798 Census of the German Colony on the Volga, Lesnoy Karamysh, also known as Grimm; Published by the American Historical Society of Germans from Russia, Lincoln, Nebraska, USA; Published date: 1995.
↑ Pleve, Igor; Lists of Colonists to Russia in 1766, "Reports by Ivan Kulberg;" Saratov State Technical University, Saratov, Russia; published in Saratov 2010; page 167, see entry for Caspar Bolender, document number 2398, daughter Anna, age 4.
Google Maps, Town of Schlitz, Germany, location when compared to Frankfurt, Germany, see: http://bit.ly/2w4qje9.
↑The 1775 and 1798 Census of the German Colony of the Volga Lesnoy Karamysh, also known as Grimm; Published by the American Historical Society of Germans from Russia, Lincoln, Nebraska, USA; Published date: 1995; family #149 in the 1798 census.
↑1834 Census of Grimm in the District of Saratov, Russia, dated 2 February 1835; Translated by Brent Mai, Concordia University, Portland, Oregon; Published by Dynasty Publishing, Beaverton, OR, USA; Published 2011; page 68, family #225.