Family #7 in the 1767 Grimm census.
Family #66 in the 1798 Grimm census.
Nikolaus Heimbuch was born in 1742 in Darmstadt, Germany. He is first recorded in the Kulberg Reports as a Lutheran farmer from Darmstadt, traveling on document number 2441 as a single immigrant.  That was in 1766, when immigrants first arrive at Oranienbaum, Russia, went through various immigration procedures and requirements, and then remained in a staging area through the winter before they headed to the Volga River and their new colonies.
By 1767, he was settled in Grimm and married to a young woman named Katharina Seibel, age 19. The couple had no children. It's not clear if they married in Oranienbaum or in Grimm.
1767 Grimm Census 
Listed as living with Nikolaus and Katharina Heimbuch were Nicholas Seibel and Eva Seibel, orphans from Friedberg. Their father is listed as Adam Seibel. The 1798 census tells us that Nikolaus' wife's name was Katharina Seibel. It seems logical that the Nikolaus had taken in his young brother and sister-in-law after the death of their father. Most likely their mother had also perished, but she is not referenced in this census.
For some reason, both the Heimbuchs and the Seibels are missing from the 1775 Grimm census.  They may have moved to another village, but if so, they returned after that and were counted in the 1798 Grimm census. The most likely explanation may be that they were accidentally excluded from the 1775 census.
The couple had five children listed below. I've added the village from where they came, if that information was in the 1798 census. From looking at the data, at least one daughter was identified as being from Müller. That may be in error. She seems a little young, born in 1781, to have moved back and forth between villages before she was 17 years old. It could be that she is not related to this family at all.
1798 Grimm Census 
By 1834, neither Nikolaus nor his wife are listed with the rest of the family in the census.  His son Nikolaus was the head of the household and he lived with one son, his wife, and two grandchildren. Most likely Nikolaus passed away prior to 1816, and his death was included in that male-only census.
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