Khabul Khan was the first known Khan

Khan (title)

Khan is an originally Altaic and subsequently Central Asian title for a sovereign or military ruler, widely used by medieval nomadic Turko-Mongol tribes living to the north of China. 'Khan' is also seen as a title in the Xianbei confederation for their chief between 283 and 289...

 of the Khamag Mongol

Khamag Mongol

Khamag Mongol was a major tribal confederation in Mongolian plateau in 12th century. It is sometimes also considered a predecessor state to the Mongol Empire....

 confederation and great-grandfather to Genghis Khan

Genghis Khan

Genghis Khan , born Temujin and occasionally known by his temple name Taizu , was the founder and Great Khan of the Mongol Empire, which became the largest contiguous empire in history after his death....

.

Khabul Khan was a son of Tumbinai Setsen and great-grandson of the Khaidu.

When the Jin army entered Mongolia with the intention of finishing Yelü Dashi

Yelü Dashi

Yelü Dashi , or Yeh-Lü Ta-Shih was the founder of the Western Liao dynasty, or the Kara-Khitan Khanate....

, Khabul Khan successfully repelled the invasions of Jin Dynasty.
In 1135, Khabul invited by Taizong of Jin

Emperor Taizong of Jin

Emperor Taizong of Jin was emperor of the Jin Dynasty, which ruled northern China from September 27, 1123 to February 9, 1135. His birth name was Wányán Wúqǐmǎi , and his reign name was Tiānhuì ....

 and he pulled the beard of the Taizong at the court of the Jin. Although, the Jin army pursued him into southern Mongolia, Khabul escaped and returned with a larger army to pillage Jin Dynasty . Though Khabul Khan had 7 sons, he nominated Ambaghai

Ambaghai

Ambaghai Khan was a khan of Khamag Mongol in 1149-1156, one of the great grandson Khaidu Khan and the cousin and predecessor of Hotula Khan. During his rule, he was captured by the Tatars under the commands of the Chinese Jin Dynasty in response to the Mongols' growing power.In 1211 Genghis Khan...

, a son of Sengun Bilge from Taichuud clan, as his successor.