From Kazakhstan Encyclopedia
Sheguy or Shikui Kaghan (r. 611–619 or possibly 610–617  ) was the third khagan of the Western Turkic Khaganate. He was the grandson of Tardu (575–603) and was followed by his brother Tong Yabghu Qaghan (c. 618–639) under whom the Kaganate reached its apex.
Western Turkic Empire in present-day Turkestan was founded as the result of the partition of the main empire after the death of Tardu in 603. It was also called On Ok ("Ten arrows") referring to ten powerful tribes in the empire. Five tribes (called Dulo) to the northeast and five tribes to the southwest (called Nushibi) formed the two rival factions, the border line being Ili River.
Sheguy who was Tardu's grandson and governor of Chach (Tashkent) was expected to be enthroned after the death of Tardu. But the Dulu clan enthroned Taman (also called Heshana Khan) who was a generation younger than Sheguy. But Taman was a very inexperienced ruler and was a puppet of Dulo clan. Nushibi clan as well as Silk road merchants who suffered from the increasing anarchy supported Sheguy to throne in 611. When Taman partisans arrested a Chinese ambassador to Sheguy, Sheguy revolted and Taman had to flee to Sui China where he was killed.
Sheguy maintained order in his empire and provided security of the silk road. His term marks the beginning of Nushibi supremacy. In 618, he was succeeded by Tong during whose reign Western Turkic Empire reached to apogee.
- 610 from Christoph Baumer, History of Central Asia, volume two, 2014, page 198, apparently following Edouard Chavannes who translated from the Chinese. 611 may be from Gumilyov.
- Baumer, same page, has him conquer Tashkent. Perhaps he conquered and became governor(?). Baumer also has him raid near Isfahan in 616-17 and 'incorporate the whole of the Altai'.
- L.N.Gumilev: Eski Türkler (tr: Ahsen Batur), İstanbul, 2002, Selenge Yayınları. ISBN 975-7856-39-8. Template:OCLC, p.199-200.