Wasn't trying to sound snarky, sorry if it came across as such, just adding some context. Also, since we're on the subject, there's also the theory that early Bulgar ruler didn't call themselves Khan at all. That theory came from one single dubious document that called the ruler Kanasubigi and non-slavic scientists automatically thought it was an early version of the title Khan. However, the title might have a slavic origin, since kanasubigi sounds a lot like the Slavic kanas u bigi (an early version of knyaz ot boga or Ruler by/from God).