Jäskis

Jäskis, or Jääski, lay beside the Vuoksi River on the Karelian Isthmus. It was named in the Treaty of Nöteborg in 1323 as one of the districts transferred from Novgorod to Sweden. The medieval district extended beyond the later town, including areas that subsequently formed several separate parishes.

The Great Northern War brought a new division. Under the Treaty of Nystad in 1721, the southern part of the Jääski district passed to the Russian Empire. The settlement became part of Vyborg province, which was incorporated into the Grand Duchy of Finland in 1812. These changes placed the same river community within successive Swedish, Russian and Finnish administrative frameworks. Its historical name therefore refers to a larger parish landscape as well as the particular settlement now known as Lesogorsky.