ONCE AGAIN ON THE TRANS-KAZAN YASAK CHUVASH
The article is devoted to the acute discussion problem of ethno-social identification of “the yasak Chuvash”, recorded in the Russian sources of the 16th-17th centuries in the left-bank areas of the Kazan region, their relationships with the sluzhily Tatars, the place and role of the trans-Kazan Chuvash in the formation of language and culture of modern Kazan Tatars.