Yangsu Tegin was a Gökturk prince. According to

Lev Gumilyov Lev Nikolayevich Gumilyov (russian: Лев Никола́евич Гумилёв; 1 October 1912 – 15 June 1992) was a Soviet historian, ethnologist, anthropologist and translator. He had a reputation for his highly unorthodox theories of et ...

, he was a son of

Tardu Tardu or Tardush Yabghu was the second yabgu of the Western Turkic Khaganate (c. 575–603), and ninth Qaghans of the Turkic khaganates, Khagan of the First Turkic Khaganate (599–603). He was the son of Istämi. Names The regnal name in Turk ...

, however Takeshi Osawa suggested that he was a son of

Muqan Qaghan Muqan Qaghan (Old Turkic: 𐰢𐰆𐰴𐰣𐰴𐰍𐰣 Muqan qaγan, Chinese:木桿可汗/木杆可汗, Pinyin: mùgǎn kěhàn, Wade-Giles: mu-kan k'o-han or 木汗可汗, mùhàn kěhàn, mu-han k'o-han, personal name: 阿史那燕都, āshǐn ...

and father of

Niri Qaghan Niri Qaghan (; Sogdian: ''nry x’γ’n'', Ruanruan: ''nı̣rı̣ kagan'') was a ruler of the Western Turkic Khaganate. Reign According to Baumer he ruled from 579 to circa 602/03. Baumer notes that the better-documented Tardu ruled from 575 ...

References

Ashina house of the Turkic Empire History of Bukhara 589 deaths 6th-century Turkic people {{CAsia-hist-stub