Family tree of Sima Yi

Sima Yi (179–251) was a general, politician and regent of the state of Cao Wei (220–265) 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. In 265, after Sima Zhao died, his son Sima Yan (236–290) forced the last Wei ruler, Cao Huan (246–303), to abdicate the throne in his favour, ending the Wei regime and establishing the Jin dynasty (265–420). This article contains the family trees of Sima Yi, his brothers, and their descendants up to Sima Yan's generation. 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 Fang had eight sons (ranked in decreasing order of seniority) – Sima Lang, Sima Yi, Sima Fu, Sima Kui, Sima Xun, Sima Jin, Sima Tong and Sima Min – who were collectively known as the "Eight Das" because their courtesy names all contained the Chinese character da (達). Sima Fang's father was Sima Jun. Sima Jun's father was Sima Liang. Sima Liang's father was Sima Jun. Sima Jun was an eighth-generation descendant of Sima Ang. Sima Ang descended from Cheng Boxiufu. Cheng Boxiufu was a descendant of Chongli, a son of Gaoyang.

Sima Lang's son was Sima Yi. Sima Lang's younger brother, Sima Fu, allowed his son Sima Wang to be Sima Lang's successor. Sima Wang was succeeded by his son Sima Hong.

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