The Tats are an indigenous
Iranian people in the Caucasus who trace their origin to the Sassanid-period migrants from Iran (ca. fifth century AD). Tat is
endangered, classified as "severely endangered" by
UNESCO's ''
Atlas of the World's Languages in Danger''. Most scholars divide Tat into two general varieties: Jewish and Muslim, with religious differences correlating with linguistic differences. Another, almost extinct, variety of Tat is spoken by Christians of Armenian origin, who are called
Armeno-Tats. ==Dialects==