Batbayan ruled the Khazarian Bulgars from 667 to 690 CE.
[1][2] Theophanes and Nicephorus record his rule after the Khazars defeated the Bulgars and Old Great Bulgaria disintegrated in 668 CE.
[3] There is a scholarly theory that he may have been the same person as Bezmer[4] of the Nominalia of the Bulgarian khans who may have been also the first son of Kubrat.
[7] Batbayan would subsequently have ruled the Bulgars as a subject of the Khazar Khagan.
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