Family #130 in the 1798 Grimm census.
Family #54 in the 1834 Grimm census.
Anna Barbara was born after the 1775 census and married before the 1798 census. This means she does not appear in a census with her birth family. She is identified in the 1798 census with her last name at birth.
1798 Grimm Census 
Anna Barbara's husband Jakob Georg Peter Rau died by 1805. By 1806, she had remarried to Andreas Kimmel; the couple had their first child in 1807.
1834 Grimm Census 
Since she was the third wife of Andreas and she didn't marry him until she was nearly 30, there is a possibility that she had also lost a spouse and that Andreas was her second husband.
The only Anna Barbara born in 1777 was Anna Barbara Brungard. The 1798 census shows that she was married to Andreas Albrandt. They were still alive and married in the 1834 census. Therefore, she must have had another LNAB.
There was only one Anna Barbara born in 1777, and all the Anna Barbaras in her age bracket had husbands in the 1798 census. Therefore the following two conditions must be true:
There was no Anna Barbara born in 1776, 1775, or 1774. There was an Anna Barbara born in 1778: Anna Barbara Schroeder. In 1798 she was married to Johann Georg Peter Rau. At the time of the 1798 census, they were both 20 and had no children. Mr. Rau does not appear in the 1834 census.
Because of this, it makes Anna Barbara Schroeder a logical match to Andreas Kimmel's third wife. If they are a match, Martin Schroeder and his wife Katharina Pea were almost certainly her parents. The families lived near each other, as per the 1798 census (#130 and #144), and Martin and Katharina had other children around Anna Barbara's age. They are also the only Schroeders in Grimm. In addition to their three 20-something-aged children in the 1798 census, they had an 8-year-old daughter named Anna Barbara. It was not uncommon for families with children whose ages spanned a large number of years to repeat the use of favored names. I believe that is what happened with this family.
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