Adam Schamber/Schomber/Schumbert was born in 1740 in the Darmstadt area of Germany, as detailed in the 1767 Grimm census. His name cannot be found in the Kulberg Reports, Deutsche Kolonisten auf dem Weg von St. Petersburg Nach Saratow, or in Danish records.
It's possible there is another way to spell this surname that would yield a find in immigration records.
In 1767, he was married to Katharina, last name at birth unknown for now, who was born in 1730. The couple had no children.
Head of the Household Adam Schamber, age 27, Lutheran farmer from Darmstadt
Wife Katharina Schamber, age 37
In the 1775 Grimm census, Adam and Katharina are listed in family 101, this time with only 5 years between their ages, rather than the 10 years that are shown in the 1767 census. That calculates to a birth year of 1740 for Adam. Obviously there is an error somewhere, but it's hard to determine if it was a census taker error, or a generalization of an age on behalf of Adam and Katharina.
In the 1798 census, Adam gives his age as 65, giving him a birth year of 1733, making him 7 years older than he was in the two previous censuses. Usually, the tendency to generalize an age is greater as one ages, so I suspect the 1740 birth year is more accurate.
By 1798, Adam was a widower. He adopted into his household Jakob Reizenstein, his wife Anna Margaretha Mauer, and their daughter Katharina, age 8. This most likely meant that he had no living children, at least none who were living in Grimm, and that Reizenstein helped him farm his land. There is a possibility that Jakob or Anna Margaretha was somehow related to Adam or his wife Katharina, but that cannot be determined from the scant details in the census records.
Head of the Household Adam Schumbert [sic], widower, age 65
Adopted into the household:
Child #1 Jakob Reizenstein, age 28
Wife of Child #1 Anna Margaretha Mauer, from Rothammel, age 28
Grandchild #1 Katharina Schumbert, age 8
↑ Pleve, Igor. List of Colonists to Russia in 1766, "Reports by Ivan Kulberg," Ministry of Education and Science of Russian Federation, Sartov State Technical University; Published in Saratov, Russia 2010.
Rauschenbach, Georg. Deutsche Kolonisten auf dem Weg von St. Petersburg nach Saratow, Transportlisten von 1766-1767, Published in Moscow, Russia, 2017.
Eichhorn, Alexander, Dr., and Dr. Jacob and Mary Eichhorn. The Immigration of German Colonists to Denmark and Their Subsequent Emigration to Russia in the Years 1759-1766, Druck and Bindung: Druckerei and Verlap Steinmeier GmbH & Co. KG, 86738, Deiningen, Germany; Published 2012.
Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767, Herausgegeben von Alfred Eisfeld under Mitarbeit von Sabine Eichwald, Published by the Nordost-Instsitut - 38085 Göttingen, 2005; page 75, family #15, Adam Schamber, 27, Lutheran farmer from Darmstadt; Wife: Katharina, 37.
↑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;
↑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; family #126 in the 1798 Grimm census, amily #126, adam Schumbert family.