Tong Yabghu Qaghan

Tong Yabghu Qaghan (died 628) (also known as Ziebel, T'ung Yabghu, Ton Yabghu, Tong Yabghu Khagan, Tun Yabghu, and Tong Yabğu, Traditional Chinese 統葉護可汗, Simplified Chinese: 统叶护可汗, pinyin Tǒngyèhù Kěhán, Wade-Giles: t'ung-yeh-hu k'o-han) was khagan of the Western Turkic Khaganate from 618 to 628 AD. His name is usually translated as "Tiger Yabgu" in Old Turkic. Another interpretation of his name is "sufficiency" or "completeness". He was the brother of Sheguy (r. 611-618), the previous khagan of the western Göktürks, and was a member of the Ashina clan. Tong Yabghu's reign is generally regarded as the zenith of the Western Göktürk Khaganate.