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In page Volga:

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The Turkic peoples associated the Itil's origin with the Kama.[13] Thus, a left tributary to the Kama was named the Aq Itil 'White Itil' which unites with the Kara Itil 'Black Itil' at the modern city of Ufa.[citation needed] The name Indyl (Indɨl) is used in the Cherkess language.