Background
He was born as Georg Wilhelm Henning in Siegerland, then County of Nassau, Holy Roman Empire (while other sources mention the neighbouring Lower Saxony).
He was born as Georg Wilhelm Henning in Siegerland, then County of Nassau, Holy Roman Empire (while other sources mention the neighbouring Lower Saxony).
He was baptized in Siegen as Georg Wilhelm Henning in 1676. He later changed his name to Gennin, which is easier to pronounce for Russian speakers. During the Grand Embassy of Peter I in 1697 Franz Lefort invited him to join the Russian Imperial army.
During the Great Northern War, Gennin excelled as an artillerist and fortification engineer
In 1728, he was promoted Lieutenant-General. At first Gennin managed the iron founderies of Olonets.
He is considered one of the founders of Petrozavodsk. In 1722, he moved to the Ural, where he served for 12 years as a manager of Ural government factories.
Together with Vasily Tatischev, he was active in the foundation of the cities of Yekaterinburg and Permanent
Gennin was the author of the book "Description of Ural and Siberian factories", where for the first time he gives the geographical and historical description of the Permanent Krai, including the Yagoshikhinskiy, Pyskorskiy and Suksunstiy factories with drawings.