Yujiulü Nagai
Yujiulü Nagai was the ruler of the Rouran from 492 to 506 and had of the title of Houqifudaikuzhe Khagan. He was the second son of Yujiulü Tuhezhen. According to Pengling Wang, his name might be cognate of the Middle Mongol Nogai, meaning "dog".
Biography
Yujiulü Doulun's reign
Yujiulü Nagai and his nephew Khagan Yujiulü Doulun fought against Gaoche ruler Afuzhiluo and his cousin Qiongqi. In 487 Afuzhiluo, Qiongqi and their clans of over 100,000 yurts escaped from the pursuing armies Doulun and Nagai. While Doulun had limited success, Nagai won all his battles against the Gaoche.Reign
In 492, he seized the position of khagan from Yujiulü Doulun thanks to a successful coup d'état by the Rouran's nobles. He later asked for physicians, craftsmans and artisans from Emperor Wu of Southern Qi, which was denied.In 501, the King of Gaochang, Ma Ru was overthrown and killed, and the people of Gaochang appointed Qu Jia as their king. Qu Jia hailed from the Zhong district of Jincheng commandery. Qu Jia at first pledged allegiance to the Rouran. That same year, having secured his borders, Nagai started raiding the northern borders of the Northern Wei.
In September 504, he led the 120,000 cavalry to the Northern Wei in six directions. He directly drove Woye Town, Huaiyu Town and went to Dai Commandery and Heng Commandery, however he was eventually stopped by Wei general Yuan Huai.
He died in 506 and was succeeded by Yujiulü Futu.