Johan Gustaf Renat

Johan Gustaf Renat (1682–1744) was a Swedish soldier and cartographer. He is mainly known for his role in bringing detailed maps of Central Asia to Europe after several years in captivity.

Renat was the son of Dutch Jewish immigrants to Sweden, who took Swedish nationality in 1681, the year before his birth.

During the Great Northern War against Russia, he served in the army of Charles XII as a warrant officer (styckjunkare) in the artillery. He was taken prisoner after the Battle of Poltava in 1709. In 1711 Renat was sent to Tobolsk where many Swedish officers were kept as prisoners of war. He entered Russian service on the condition of not fighting against Sweden. Renat helped produce maps of Siberia for the Russian government.

In 1716 Renat and other Swedish prisoners-of-war took part in 's expedition to explore the gold deposits around Lake Yamysh on the Irtysh River. The expedition was ambushed by a Dzungar force, and Renat spent the following seventeen years in Dzungar captivity.

In Dzungaria, Renat helped the khans Tsewang Rabtan and Galdan Tseren to organize their campaigns against Qing rule in Central Asia. Among other things, he organized an artillery regiment and helped the Dzungars to cast cannons.

Renat also met a Swedish woman who was also a Dzungar captive. This was Brigitta Scherzenfeldt, who hailed from Scania. Twice widowed, she had married a German prisoner who had taken Russian service and been assigned to Siberia. Their convoy was seized by Dzungar raiders in 1716, who killed her husband. She later married Renat.

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