Shikui Khagan
Shikui Khagan, also Zik Khagan was the third khagan of the Western Turkic Khaganate. He was the grandson of Tardu through his son Tulu.
Background
The Western Turkic Khaganate in present-day Turkestan was founded as the result of the partition of the First Turkic Khaganate after the death of Tardu in 603. It was also called On Ok referring to ten powerful tribes in the khaganate. Five tribes to the northeast and five tribes to the southwest formed the two rival factions, the border line being the Ili River.After partitioning
Shikui Khagan was Tardu's grandson and governor of Chach He was expected to be enthroned after the death of Tardu. But the Dulu faction enthroned Ashina Daman who was a generation younger than Shekui. But Daman was a very inexperienced ruler and was a puppet of the Dulu clan. The Nushibi clan as well as Silk Road merchants who suffered from the increasing anarchy supported Shikuito throne in 611. When Daman affiliated partisans arrested a Chinese ambassador to Shekui, Shikuirevolted and Daman had to flee to Sui China where he was killed.Shikuimaintained order in the khaganate and provided security on the Silk Road. His reign marks the beginning of Nushibi supremacy. In 618, he was succeeded by his brother Tong during whose reign Western Turkic Khaganate reached to apogee.
Coinage
Shikui Khagan is known from numismatics, especially a silver medallion issued in 616–617 in Isfahan after his victory over the Sasanids and the Hephthalites. His campaign led him deep into Iran, in the areas of Ray and Isfahan. The obverse of the coin portrays the ruler and bears the Pahlavi inscriptions GDH 'pzwn zyk, and MLK"n MLK'. The reverse displays an altar with fire, with attendants left and right. The iconography of the portrait is similar to that of the coinage of the Western Turk ruler Tong Yabghu Qaghan.A seal is also known in his name, for the administration of the conquered territory. It is kept in the private collection of Forughi in Iran. It contains a Middle Persian inscription reading zyk hhn GDH and the a runic inscription bqšeb qiygŋkӣ.
The coinage of Zik is considered as highly similar to that of the early Samanid ruler Mansur I, suggesting some kind of continuity.