Baltic psaltery

Baltic psaltery is a family of related plucked box zithers historically found in the south east vicinity of the Baltic Sea and played by the Baltic people, Baltic Finns, Volga Finns and northwestern Russians. These instruments include:

The internationally most known instrument of the family is Finnish kantele, so its name is sometimes used in English to also refer to the rest of the Baltic psalteries. Many of the Baltic psalteries hold a strong symbolic significance in their respective countries, including Finland, Latvia, Lithuania, Estonia and Russia, where playing training and instrument makers are available.

...
Wikipedia