Which Russian linguist was a member of the Kazan School?
Kazan school: Kazan School was an influential group of linguists in Kazan. Kazan school:  The linguistic circle included the Polish linguist Jan Baudouin de Courtenay and his student Nikolai Trubetzkoy. Nikolai Trubetzkoy: Prince Nikolai Sergeyevich Trubetzkoy (also Troubetskoy; Russian: Никола́й Серге́евич Трубецко́й; Moscow, April 16, 1890 – Vienna, June 25, 1938) was a Russian linguist and historian whose teachings formed a nucleus of the Prague School of structural linguistics.
Nikolai Trubetzkoy