Wikipedia
Idel-Ural (; ) is a historical region in Eastern Europe, in what is today Russia. The name literally means Volga- Urals in the Tatar language. The frequently used Russian variant is Volgo-Uralye . The term Idel-Ural is often used to designate 6 republics of Russia of this region: Bashkortostan, Chuvashia, Mari El, Mordovia, Tatarstan, Udmurtia, especially in Tatar-language literature or in the context of minority languages. Idel-Ural is included within the Volga Region (Поволжье, Povolzhye). The major religions in the region are Islam and Orthodox Christianity.
Before being conquered by Tsardom of Russia in the 16th century, the region was dominated by native Uralic tribes and a succession of Turkic empires such as Volga Bulgaria, the Khazars, the Golden Horde and the Khanate of Kazan.