What is "yesugen"

Yesugen was one of the wives of Genghis Khan, the founder of the Mongol Empire. She was of Tatar ancestry. Her sister Yesui was also a wife of Genghis Khan.

To Yesugen were assigned the Khangai Mountains as territory. Like his other wives, Yesugen had her own ordo, or court. However, she did not wield the same power or influence as his first wife Börte.