Family #113 in the 1834 Grimm census.
Family #131 in the 1857 Grimm census.
Maria Elisabeth was born after the 1798 census and married before the 1834 census. This means she was not captured in a census with her biological parents. Unless we find a descendant who has detailed private records, we will probably never know her last name at birth.
Studying the maternal haplogroup of Maria Elisabeth's female descendants could help narrow down her maternal ancestry.
She is not specifically listed in the 1857 census, but her husband and children are. She died after the birth of her youngest child, Margaretha, in 1846, and before the 1857 census.
Head of the Household Georg Christoph Heide, age 37, to household #292
Child #1 Johannes Heide, age 11 in 1816, to household #292
Child #2 Ernst Friedrich Heide, age 8 in 1816, to household #292
Child #3 Johann Adam Heide, age 4 in 1816, to household #292
Brother Ernst Friedrich Heide, age 51
Wife of Brother Anna Margaretha Heide, age 54
Child #4 Johann Ludwig Heide, age 26
Wife of Child #4 Maria Elisabeth Heide, age 22
Grandchild #1 Katharina Heide, age 2 years 6 months
Grandchild #2 Louisa Barbara Heide, age 1 year 3 months
Child #5 Katharina Barbara Heide, age 25
Child #6 Johann Heinrich Heide, age 18
Child #7 Johannes Heide, age 15
Maria Elisabeth's name is missing from the 1857 census, and the most likely reason is because she had passed away. Her youngest child was 11 years old in 1857, giving her a birth year of 1846. Maria Elisbeth probably passed away between 1846 and 1857.
Child #7 Heinrich (#1) Heide, age 6 in 1850, deceased 1852
Child #8 Alexander Heide, age 8 years 6 months
Child #9 Heinrich (#2) Heide, age 4
Child #10 Georg Jakob Heide, age 1 year 6 months
Brother #2 Johannes Heide, age 38
Wife of Brother #2 Katharina Barbara Heide, age 35
Child #11 Johann Jakob Heide, age 6 in 1850, deceased 1852
Child #12 Johann Tobias Heide, age 6 months in 1850, deceased 1853
Child #13 Georg Jakob Heide, age 6 months
↑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 36, family #113, Georg Christoph Heide family.
↑1857 Census of Grimm in the District of Saratov, Russia, dated 5 November 1857; Translated by Brent Mai, Concordia University, Portland, Oregon; Published by Dynasty Publishing, Beaverton, OR, USA; Published 2005; page 50, family #131, Johann Ludwig Heide family.