Overview
Yami Qaghan ( Jаmï qağan; Chinese: 啓民可汗, 啟民可汗/启民可汗; Pinyin: Qǐmín Kěhàn, Wade-Giles: Ch'i-min K'o-han, Middle Chinese (Guangyun): ), personal name Ashina Rangan (阿史那染幹/阿史那染干, pinyin Āshǐnà rǎngān; Wade-Giles A-shih-na jan-kan, ), at one point known as Tolis Qaghan (突利可汗, , Töles qaγan) and later El Ïduk Jamï(r) Qağan (意利珍豆啟民可汗/意利珍豆启民可汗, Yìlì Zhēndòu Qǐmín Kěhàn) was the first qaghan of the Eastern Turkic Khaganate.
Background
His parentage is uncertain as he was either son of Bagha Qaghan or Ishbara Qaghan. He was a subordinate khagan under Tulan Qaghan with title of Tolis Qaghan, ruling eastern tribes.
He sent an ambassador to Sui dynasty in 597, requesting to marry to a Chinese princess. Pei Ju saw this as opportunity and told him to kill Tulan Qaghan's Zhou origin khatun Princess Qianjin (who was styled as Princess Dayi by Sui dynasty). Princess was murdered and emperor fulfilled his promise, sending Princess Anyi (安义公主) to marry him.
However, Tolis' ambitious behaviour caused outrage to khagan. Tulan started to gather invasion party to attack Sui repeatedly in 597 and 599, only to be reported to emperor beforehand by Tolis every occasion. As a reaction, Tulan approached to Tardu to combine forces and attack Tolis. Attack was a success and Tolis had to flee to China after his brothers and nephews getting killed during invasion.
From Wikipedia (CC BY-SA 4.0).