Sima Yi (179–251) was a general, politician and regent of the state of Cao Wei (220–266) in the Three Kingdoms period (220–280) in China.
Two of his sons, Sima Shi (208–255) and Sima Zhao (211–265), rose to power in the 250s and consecutively served as regents throughout the reigns of the last three Wei emperors.
After Sima Zhao died in September 265, his son Sima Yan (236–290) forced the last Wei ruler, Cao Huan (246–303), to abdicate the throne in his favour in February 266, ending the Wei regime and establishing the Jin dynasty (266–420).
For more details on the family trees of the Jin emperors (Sima Yan's generation and beyond), see Chinese emperors family tree (early)#Jin Dynasty and Chu.
Sima Ang descended from Cheng Boxiufu.
Cheng Boxiufu was a descendant of Chongli, a son of Gaoyang.
[11] He had a son with Lady Bai: Sima Lun.
[12] Sima Yi also had another daughter – Princess Gaolingxuan (personal name unknown) – who was married to Du Yu.
1The Sanguozhi mentioned that Xun Yi married a younger sister of Sima Shi and Sima Zhao, but did not specifically mention that she was Princess Nanyang.
It is assumed that this "younger sister" of Sima Shi and Sima Zhao was Princess Nanyang because she was their only biological sister, according to the Jin Shu.
In addition, Pan Yue's "Euology to Elder Princess of Nanyang" (《南阳长公主诔》) had a line referencing the Xun clan (“言告言归，作合于荀”).
Sima Shi had three wives: Xiahou Hui, Lady Wu (personal name unknown) and Yang Huiyu.
Yang Huiyu did not have any sons with Sima Shi.
The Lady of Deyang District was Cao Zhen's younger sister.
Xiahou Hui bore Sima Shi five daughters but no sons.
[17] One of the five daughters was married to Zhen De but she died early.
They also had a daughter – Princess Jingzhao, whose personal name is unknown.
Sima Dan's wife, Lady Guo, was a sister-in-law of Empress Jia Nanfeng.