Cao Huan
Cao Huan's birth name was "Cao Huang" (). His father, Cao Yu, the Prince of Yan, was a son of Cao Cao, the father of Wei's first emperor, Cao Pi. In 258, at the age of 12, in accordance with Wei's regulations that the sons of princes (other than the first-born son of the prince's spouse, customarily designated the prince's heir) were to be instated as dukes, Cao Huan was instated as the "Duke of Changdao District" ().