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Sima Yong

This article is part of
the War of the Eight Princes
series.
Eight Princes
Sima Liang
Sima Wei
Sima Lun
Sima Jiong
Sima Ai
Sima Ying
Sima Yong
Sima Yue
Other key figures
Emperor Hui
Emperor Huai
Empress Yang Zhi
Jia Nanfeng
Yang Xianrong
Sima Yu
Yang Jun
Wei Guan
Zhang Hua

Sima Yong (司馬顒) (died 306), courtesy name Wenzai (文載), was a Jin Dynasty (265-420) imperial prince and briefly a regent for Emperor Hui. He was the seventh of eight princes commonly associated with the War of the Eight Princes. His title was the Prince of Hejian (河間王), but he did not receive any posthumous names.

Sima Yong was the grandson of Sima Fu Prince Xian of Anping, the younger brother of Sima Yi and granduncle to Jin Dynasty's founder, Emperor Wu. His father Sima Gui (司馬瑰) was the Prince of Taiyuan, and after his death, Sima Yong inherited his principality. In 276, he was sent to his principality (roughly modern Taiyuan, Shanxi), but in 277 his principality was moved to Hejian (河間, roughly modern Cangzhou, Hebei). He became known for his knack for finding capable associates, and when he visited Lthe capital Luoyang on an official visit, Emperor Wu became impressed by him and stated that he could be a good example to other princes. In 299, during the reign of Emperor Hui, he was put in charge of defending the important city of Chang'an -- a post which Emperor Wu had left instructions that only someone who was closely related to the emperor should be allowed to take, but which the high level officials found appropriate for Sima Yong due to his reputation.

When Emperor Hui's throne was usurped by Sima Lun the Prince of Zhao in 301, Sima Jiong the Prince of Qi (Emperor Hui's cousin) started a rebellion to restore Emperor Hui. Initially, Sima Yong sent his general Zhang Fang (張方) to support Sima Lun, but once he heard that Sima Jiong and his ally, Sima Ying the Prince of Chengdu (Emperor Hui's brother) had overwhelming force, he switched side and declared for the rebels. After Princes Jiong and Ying defeated and killed Sima Lun, Prince Jiong became regent and he, while angry at Sima Yong for initially supporting Sima Lun, nevertheless granted him additional honors as well as three of the nine bestowments.


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