Sima You, courtesy name Dayou (大猷), posthumously known as Prince Xian of Qi (齐献王), was an imperial prince of the Western Jin dynasty of China. He was the second son of Sima Zhao, a regent of the Cao Wei state during the Three Kingdoms period, and Zhao's wife Wang Yuanji. His wife was a daughter of Jia Chong and Jia's first wife Li Wan; Li Wan herself was a daughter of Li Feng.
- Occupation
- politician
- Citizenship
- Cao Wei, Western Jin dynasty
- Born
- 246
- Died
- April 27, 283
