Kotrag
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- See also: Kotrags
Kotrag Khan was the founder of Volga Bulgaria. He was the son of Kubrat who left Great Bulgaria after the death of his father. His country recognised Islam as the official religion in the 10th century and remained independent up until the 14th century, when it was conquered by the Tatars. The country's capital was called "Bulgar" or "Great Bulgar".