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Wiki information Kotrag:

Kotrag
Person

Khagan Kotrag was the "son" of Kubrat of the Dulo clan who inherited the leadership of the Kazarigs. Khagan Kotrag simply means leader of the Kotrags and may refer to at least two or more people such as Khalga and Kaban who may or may not in fact...

Kotrag Nunatak
Location

Kotrag Nunatak is a conspicuous rocky peak of elevation 290 m projecting from Murgash Glacier, Greenwich Island in the South Shetland Islands, Antarctica. It was named after Khan Kotrag, founder of the Kingdom of Volga Bulgaria in the 7th Century AD.