Does anyone know any good books or websites with information about the Volga-Bulgarians especially about the names of their khans? This question is sort of related to playing MTW, as you can play the Volga-Bulgars in the XL mod, but I have found it a bit unrealistic that their khans and generals have names similar to the Mongols. Since the Volga-Bulgarians were a Muslim nation, wouldn't they have Muslim or Arabic names, such as Muhammad or Ahmad?

Any help would be much appreciated.

Marquis de Said