Sima You

Sima You (248–283), courtesy name Dayou, was an imperial prince of the Jin dynasty (265–420) of China. He was the second son of Sima Zhao, a regent of the Cao Wei state during the Three Kingdoms period. Sima You became the heir to his uncle, Sima Shi, who at the time was sonless. It is known that Sima You was a person of mild-mannered character who was expected to be appointed emperor, but ended being passed over due to that of his young age. The heir that was chosen was Sima Zhao's first son, Sima Yan, who usurped the Cao Wei throne and established the Jin dynasty with himself as the new emperor in 265.