Kutlug I Bilge Khagan
Kutlug I Bilge Boyla Khagan, also known by his throne name Qutlugh Bilge Kül Qaghan, and in Chinese sources by the personal name of Yaoluoge Yibiaobi was the khagan of the Uyghur Khaganate from 744 to 747.
Service in Second Turkic Khaganate
His title was Külüg Boyla during the Second Turkic Khaganate. He was a son of Yaoluoge Hushu. His father was the chieftain of Yaglakar clan and made numerous raids into Tang China. In 727 he ambushed Jiedushi Wang Junchuo killing him and wounding Niu Xianke. He succeeded his father at some point after 727.After Bilge Qaghan of the Second Turkic Khaganate died, a factional struggle arose within the ruling Ashina clan. An alliance of Basmyls, Uyghurs and Karluks overthrew the Second Turkic Khaganate and in the spring of 745 and killed Özmiş Khagan. At first, the Basmyl chief was elected a Kaghan titled Eletmish Kaghan, but he was soon overthrown by the allies, who elected Kutlug Boyla as Kutlug Bilge Kaghan.
Reign
After coming to power in 744, Kutlug Bilge Khagan moved his court to Ordu-Baliq in the Orkhon valley. Kutlug Bilge Kaghan maintained an alliance with Tang China. He was made Prince of Fengyi and Huairen Khagan.In 745 the Uyghurs defeated the last Turkic Khagan Baimei Khagan, and Kutlug Bilge Kaghan ordered his head to be sent to Chang'an, after which the Tang Emperor thanked him by entitling him "Supernumerary General-in-chief of Left Courageous Guard". For the next two years, the Uyghur power continuously expanded, although its control did not reach the size of the Turkic Khaganate.
He died in 747 and left his son Tay Bilge Tutuq as heir to throne, however his other son Bayanchur Khan killed him and usurped the throne. He had another son whose name is not recorded by sources. However through this son, he had at least one grandson named Chabish Tegin. Chabish had two sons; Qari Cor Tegin and Tun Bagha Tarkhan, the latter succeeding his cousin Bögü Tengri Qaghan.
Reorganized tribes
At first he proclaimed himself as Tokuz Oghuz khagan. Nine tribes included Toquz Oghuz, which were the Khaganal clan/sub-tribe Yaglakar and eight Uyghur clans/sub-tribes known in Chinese rendering:- Huduoge 胡咄葛
- Guluowu 啒罗勿
- Mogexiqi 貊歌息讫
- A-Wudi 阿勿嘀
- Gesa 葛萨
- Huwasu 斛嗢素
- Yaowuge 藥勿葛
- Xiyawu 奚牙勿
According to Haneda, Toquz Oğuz were the Yaglakar-led group of nine clans included in the Uyghur tribe. In contrast, Golden proposed that Toquz Oğuz consisted of a Uygur-led group comprising nine tribes: Bugu, Hun, Bayegu, Tongluo, Sijie, Qibi, A-Busi, Gulunwugusi and the Uyghur proper, which comprised the nine clans of Yaglakar, Huduoge, Guluowu, Mogexiqi, AWudi, Gesa, Huwasu, Yaowuge, and Xiyawu. The Shine Usu inscription mentioned that the Yaqlakar ruled over the On-Uyğur and Toquz Oghuz. Meanwhile, noticing that Tang Huiyao called the nine groups, led by Yaglakar, "surname-tribes" while the Old Book of Tang and New Book of Tang called the other nine groups, led by Uyghurs, "tribes", Japanese scholars Hashimoto, Katayama, and Senga propose that the Tang Huiyao's list contained the names of the Toquz Oghuz tribes proper, while each name in the two lists in the Books of Tang recorded each surname of each of nine subtribal chiefs.