- See also: Kotrags
Khan Kotrag(Chuvash: Кăтра Паттăр, Kătra Pattăr) was the founder of Volga Bulgaria. He was the son of Kubrat who left Great Bulgaria after the death of his father. His successors reached the lands of modern Tatarstan and established a state during the 7th to 9th centuries and recognised Islam as the official religion in 922 AD during the visit of Baghdad khalifat ambassador Ibn Fazlan and remained independent up until the 13th century, when it was conquered by the Batu-khan hordes of Mongolic and Turkic people widely known as Mongol-Tatars. The country's capital was called "Bulgar" or "Great Bulgar".
See also: Kazarig
Kotrag Nunatak on Greenwich Island in the South Shetland Islands, Antarctica is named after Kotrag.