that "Khagans of Mongol Empire" was a mistake, and changed it to "the Mongol Empire". Feel free to revert if you know of a good reason for either of those...

Obviously not all the early khagans/regents of the Mongol Empire were posthumously promoted by Kublai Khan (the founder of the Yuan Dynasty) as Yuan emperors...

Szádeczky-Kardoss, many of the titles and ranks used by the Pannonian Avars were also used by Turks, Proto-Bulgars, Uighurs and/or Mongols, including khagan (or kagan)...

place of birth is specified but a date of birth isn't, for monarchs where the date of birth is unknown? Currently the contents of the "place of birth"...