Juqu Mengxun

Juqu Mengxun (Chinese: 沮渠蒙遜; 368–433) was a king of the Xiongnu state Northern Liang, and the first from the Juqu clan. His cousin Juqu Nancheng (沮渠男成) and he initially supported Duan Ye as prince of Northern Liang in 397 after rebelling against Later Liang, but in 401, Juqu Mengxun tricked Duan Ye into wrongly executing Juqu Nancheng, and then used that as an excuse to attack and kill Duan Ye, taking over the throne himself. While he maintained his own state, he also nominally served as a vassal of Later Qin, Jin, and Northern Wei. He was considered a capable ruler when young, but in old age was considered cruel and arbitrary.

Under Later Liang and Duan Ye

Juqu Mengxun was born in 368, while the area that would later be his domain was under the rule of Former Liang, but little is known about his early years. He was of Xiongnu ancestry, and it was said that his ancestors served as the left Juqu (an office title of unclear responsibility) for Xiongnu Chanyus, and so they started using Juqu as the family name. Later, during Former Qin and Later Liang rule, Juqu Mengxun became known for broad knowledge in history and military tactics and thought to be both humorous and full of strategies, and became feared by the Former Qin governor Liang Xi (梁熙) and the Later Liang emperor Lü Guang, and so he tried to divert attention from himself by drinking heavily and spending time on frivolous matters.