In Chapter 39 of the Romance, Cao Cao abolishes the posts of the Three Excellencies and holds them himself as Chancellor, appointing Mao Jie as Clerk of the Eastern Bureau, Cui Yan as Clerk of the Western Bureau and Sima Yi as Clerk of Literature. At this point the Romance introduces Sima Yi as 'courtesy name Zhongda, a man of Wen County in Henei, the grandson of Sima Jun (司馬雋), Administrator of Yingchuan, the son of Sima Fang, Intendant of Jingzhao, and the younger brother of the Registrar Sima Lang'. Romance, Ch. 39 §21
In Chapter 119, Sima Yan, Emperor of Jin, posthumously honors Sima Yi as Emperor Xuan, Sima Shi as Emperor Jing and Sima Zhao as Emperor Wen, and establishes the seven ancestral temples. The Romance traces these seven temples from Sima Jun (司馬鈞), General Who Conquers the West under the Han, through Sima Liang, Administrator of Yuzhang, and Sima Jun (司馬雋), Administrator of Yingchuan, to Sima Fang, Intendant of Jingzhao, and records that Sima Fang fathered Emperor Xuan, Sima Yi, and that Sima Yi fathered Emperor Jing, Sima Shi, and Emperor Wen, Sima Zhao. There is no scene in which Sima Fang himself appears. Romance, Ch. 119 §47