Bumin Qaghan (Old Turkic: 𐰉𐰆𐰢𐰣:𐰴𐰍𐰣, romanized: Bumïn qaɣan, died 552 AD) was the founder of the First Turkic Khaganate. His regnal title was Illig Qaghan (Chinese: 伊利可汗, romanized: Yīlì Kèhán, Wade–Giles: i-li k'o-han). He was the eldest son of Ashina Tuwu (吐務 / 吐务). He was the chieftain of the Turks under the sovereignty of the Rouran Khaganate. He is also mentioned as Tumen (土門, 吐門, commander of ten thousand) of the Rouran Khaganate.
Ashina Tuwu (Chinese: 吐務) was an early Göktürks chief and ancestor of their khagans. Besides carrying title of Da Yehu (大葉護 Grand Yabgu), little else is known about him. He would be succeeded by his oldest son Bumin, who together with his younger brother Istämi founded the Gokturk Khaganate.
The Göktürks (Old Turkic: 𐱅𐰇𐰼𐰜:𐰉𐰆𐰑𐰣, romanized: Türük Bodun; Chinese: 突厥; pinyin: Tūjué; Wade–Giles: T'u-chüeh), also known as Türks, Celestial Turks or Blue Turks, were a Turkic people in medieval Inner Asia. The Göktürks, under the leadership of Bumin Qaghan (d. 552) and his sons, succeeded the Rouran Khaganate as the main power in the region and established the First Turkic Khaganate, one of several nomadic dynasties that would shape the future geolocation, culture, and dominant beliefs of Turkic peoples.
The First Turkic Khaganate, also referred to as the First Turkic Empire, the Turkic Khaganate or the Göktürk Khaganate, was a Turkic khaganate established by the Ashina clan of the Göktürks in medieval Inner Asia under the leadership of Bumin Qaghan (d. 552) and his brother Istämi. The First Turkic Khaganate succeeded the Rouran Khaganate as the hegemonic power of the Mongolian Plateau and rapidly expanded their territories in Central Asia. The khaganate became the first Central Asian transcontinental empire from Manchuria to the Black Sea.
Although the Göktürks spoke a Siberian Turkic language, the direct predecessor to the Orkhon Turkic of the Second Turkic Khaganate, the First Khaganate's early official texts and coins were written in Sogdian. It was the first Turkic state to use the name Türk politically. The Old Turkic script was invented in the first half of the sixth century.
The Ashina (Chinese: 阿史那; pinyin: Āshǐnà; Wade–Giles: A-shih-na; Middle Chinese: (Guangyun) [ʔɑʃi̯ə˥nɑ˩]) were a Turkic tribe and the ruling dynasty of the Göktürks. They rose to prominence in the mid-6th century when the leader, Bumin Qaghan (died 552), revolted against the Rouran Khaganate. The two main branches of the family, one descended from Bumin and the other from his brother Istämi, ruled over the eastern and western parts of the Göktürk confederation, respectively, forming the First Turkic Khaganate (552–603).
Istämi (or Sinjibu or Dizabul or Ishtemi Sir Yabghu Khagan; Chinese: 室點密)was the ruler of the western part of the Göktürks, which became the Western Turkic Khaganate and dominated the Sogdians. He was the yabghu (vassal) of his brother Bumin Qaghan in 552 AD. He was posthumously referred to as khagan in Turkic sources. Tardu was his son.