Istämi

In the 6th century AD, Istämi (Old Turkic: 𐰃𐰾𐱅𐰢𐰃:𐰴𐰍𐰣, romanized: Istemi qaɣan or Sinjibu or Dizabul or Ishtemi Sir Yabghu Khagan; Chinese: 室點密) ruled the western part of the territory of the Göktürks, which became the Western Turkic Khaganate on the Eurasian steppe and dominated the Sogdians. He was the yabghu (vassal) of his brother Bumin Qaghan in 552 AD. Turkic sources refer to him posthumously as a khagan. Tardu was his son.