Köten.

About Köten

Köten was a Cuman–Kipchak chieftain (khan) and military commander active in the mid-13th century. He forged an important alliance with the Kievan Rus' against the Mongols but was ultimately defeated by them at the Kalka River in 1223. After the Mongol victory, Köten led 40,000 "huts" to Hungary, where he became an ally of the Hungarian king and accepted Catholicism, but was nonetheless assassinated by the Hungarian nobility.