Cao Xun (231–244) was the older of two adopted sons of Cao Rui, second emperor of the state of Cao Wei during the Three Kingdoms period of Chinese history. The palace suppressed details of the adoption to obscure the origin of Cao Xun and his brother Cao Fang, but Sun Sheng's Chronicle of the House of Wei claims the brothers may have been sons of the emperor's cousin Cao Kai (曹楷).
Cao Rui enfeoffed Cao Xun as Prince of Qin on 23 September 235. This provides a terminus ante quem for his adoption as an imperial son.
Cao Xun died in 244, in the autumn.
- Chen Shou (1977) [280s or 290s]. Pei Songzhi, ed. 三國志 [Records of the Three Kingdoms]. Taibei: Dingwen Printing.
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