Family B-199 in The Immigration of German Colonists to Denmark and Their Subsequent Emigration to Russia in the Years 1759-1766</i>.
Family Rus14-3 in The Immigration of German Colonists to Denmark and Their Subsequent Emigration to Russia in the Years 1759-1766</i>.
Family #67 in the 1775 Grimm census.
Johann Busch was born in 1747 in the district of Gueglingen, Duchy of Württemberg to Johann Balthasar and Margaretha Busch, an Evangelical Lutheran family. Württemberg and the surrounding area had been ravaged by war and famine for many years, and many of the residents, including the Busch family, were poor farmers with little chance of bettering their lives. Johann's father was concerned providing for his family, as well as to find a way for his children to have better opportunities than he had.
Johann was one of five siblings:
In 1759, Danish King Frederick V invited Germans from Hessen and the Palantinate to help settle the area of Schleswig-Holstein, at that time under the control of the Danes. The king was interested in converting the marsh lands to arable farm land. Germans were known for their good farming skills and for being hard workers, so it seemed like a win-win situation both both Danes and Germans. Johann's father decided the opportunity to immigrate to Denmark with his family was too attractive to pass up.
He and his family arrived in the Flensburg, the Royal Duchy of Schleswig on 17 July 1761.  They moved to Denmark in November of 1761, living in Colony J3 Friderichsmose in the district of Silkeborg.  They were last recorded living in Denmark in January of 1765. 
The marshlands were very inhospitable to all farmers. Although Germans were known for being hardworking and good farmers with typical farm land, it was far more difficult to convert these former wetlands and grow crops. Most of the German immigrants barely reaped enough to feed their families, let alone to provide food for others in Denmark.
Around that same time, Catherine the Great invited Germans to immigrate to Russia. This offered Johann's family an opportunity for a new, more prosperous life. In 1765, Johann and his father decided to immigrate with their families to Russia. It is unclear when the families left Denmark for Russia, but they are included on an immigration list of 57 German Danish colonists who traveled to Grimm, Russia.
By the time the family immigrated to Russia, Johann married wife Eva Maria, a widow with two daughters. Since they were now considered two families, they were listed separately in the 1775 Grimm Census:
1775 Grimm Census, Family #67 
This census listing is for Johann and his family.
1775 Grimm Census, Family #73 
This census listing is for Johann's father and siblings. It also reveals that Johann's mother must have died and his father remarried to the widow of Mr. Schultheis. She brought three daughters into the family with her, Johann's stepsisters.
He moved with his family to Enders (Ust-Karaman), a village north of Saratov, in 1788.  His reasons for moving are unclear.
Research on this family continues.
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