|Khan of Southern Naimans|
|Predecessor||Inanch Bilge khan|
|Father||Inanch Bilge khan|
After his father's death, he split off with a faction of Naimans to rule near the Altai Mountains. He was present in kurultai where Jamukha was elected Gurkhan in 1201. According to a story, he, along with the Oirat chief Quduqa Bäki, used a jada or "thunder stone" to unleash a powerful storm on Genghis' army. But the magical ploy backfired when an unexpected wind blew the storm back at Quduqa. Buyruq, troubled by this storm, left the alliance and retreated to the south side of the Altai Mountains.
He was soon attacked by Keraites led by Toghrul in 1202, in alliance with Genghis on shores of Soqoq-Usun river (in modern Ulaangom). Caught unprepared, Buyruq fled and crossed Altai, arriving at Ulungur river. Buyruq's general Kökse Sabraq attacked Toghrul who moved away from Genghis, defeated Toghrul's son Senggüm, capturing his son and wife in process.
Following Buyruq's defeat in 1202, he joined forces with Kerait prince Jaqa Gambu, Jamukha, Toktoqa (chief of Merkids), and Quduqa (chief of Oirats) as well as Kuchlug. However he was ambushed by Genghis' forces while hunting in 1206. His nephew Kuchlug then took over the Naiman leadership.
- Rachewiltz, Igor De (2005-01-01). "The Secret History of the Mongols: A Mongolian epic chronicle of the thirteenth century Translated with a historical and philological commentary". Inner Asia. 7 (1): 125–132. doi:10.1163/146481705793647044. ISSN 1464-8172.
- The Secret History of The Mongols, §144
- Onon, Professor Urgunge; Onon, Urgunge (2005-08-18). The Secret History of the Mongols: The Life and Times of Chinggis Khan. Routledge. p. 135. ISBN 9781135795566.
- Grousset, René (1970). The Empire of the Steppes: A History of Central Asia. Rutgers University Press. pp. 215. ISBN 9780813513041.