Kul Tigin

Kul Tigin ( , Pinyin: Quètèqín, Wade-Giles: chüeh-t'e-ch'in, Xiao'erjing: ٿُؤ تْ ٿٍ, AD 684–731) was a general and a prince of the Second Turkic Khaganate.
Etymology.
Necip Asım (1921) for the first time did read his name as "köl", based on the etymology of Mahmud al-Kashgari, meaning "lake, sea". Radloff did read this word as "kül", and Thomsen (1896), Malov (1951) and Tekin (1968) adopted this reading. Bazin (1956) and Hamilton (1962) rejected Radloff's reading and preferred the form "köl". However, Chinese sources used the Chinese character 闕 ("què"). Therefore this word should be read as "kül", not "köl".
Early years.
He was a second son of Ilterish Qaghan, the dynasty's founder, and the younger brother of Bilge Kaghan, the fourth kaghan. He was seven when his father died.
During the reign of Qapagan Khaghan, Kul Tigin and his older brother earned reputation for their military prowess. They defeated Yenisei Kirghiz, Turgesh, and the Karluks, extending the Kaganate territory all the way to the Iron Gate south of Samarkand. They also subjugated all nine of the Tokuz Oguz tribes.
In 705, Tujue forces commanded by Mojilian entered Lingwu, defeating Shazha Chongyi (沙吒忠义). Kul Tigin commanded a unit in battle, in which he lost three horses.
In 711, he participated in Battle of Bolchu, which was disastrous for Turgesh.
In 713 he participated in subjugation of Karluk tribes with his brother and uncle.
As supreme commander.
Upon the death of Qapagan Khaghan, his son Inel Qaghan attempted to illegally ascend to the throne, defying the traditional Lateral succession law, but Kül Tigin refused to recognize the takeover. He raised an army, attacked, and killed Inel, Ashina Duoxifu and his trusted followers. He placed his elder brother Bilge Khagan on the throne, and took the title of Shad, an equivalent of commander-in-chief of the army, for himself.
Death.
He died suddenly in 27 February 731. A stele in memory of Kül Tigin, which included inscriptions in both the Turkic and Chinese, was erected at his memorial complex at the present site of the Orkhon inscriptions. Kül-Tegin is also mentioned in the inscription erected in memory of his older brother Bilge Qaghan at the neighbouring site of Khöshöö-Tsaidam-1.
His burial ceremony took place in 1 November 731. He was posthumously renamed Inanču Apa Yarğan Tarqan () by Bilge Khagan.
The head of the Kül Tigin sculpture in the Khöshöö-Tsaidam enclave in (Orkhon, in northern Mongolia) carries a bird with wings spread like an eagle, personifying a raven.
Popular culture.
He was portrayed by Ham Suk Hun (함석훈) in Korean TV Series "Dae Jo Yeong."