…including banjos with only 2 and 3 strings yet! Doshpuluur - traditionally 2-stringed, long-necked lute; Tovshuur - a 2- or 3-stringed lute.
Being a horsewoman, I also especially approve of the Tuvan and Mongolian 2-string horsehead fiddles, the igil and morin khuur.
"The fact that most of the eastern Turkic neighbors of the Mongols possess similar horse hair instruments (such as the Tuvan igil, the Kazakh kobyz, or the Kyrgyz Kyl kyyak), though not western Turkic, may point to a possible origin amongst peoples that once inhabited the Mongolian Steppe, and migrated to what is now Tuva, Kazakhstan and Kyrgyzstan.
“The gusle from Southeastern Europe (Serbia, Croatia & Albania) is a very similar instrument, and may indicate this is an extremely ancient instrument perhaps even dating back to the outward migration of people out of the Middle East and Central Asia some 40,000 years ago. Often these instruments are depicted with a goat head instead of a horse in Europe.”