Hello, maybe it refers to the official name instead of the surname? Sima was the official name of the central government in Shang Dynasty, ranking second only to Sangong, equivalent to Liu Qing. Together with Si Tuleideng, Sikong, Shi Si and Sikou, it is called ENT, which is in charge of military affairs and taxes. During the Spring and Autumn Period and the Warring States Period, some ministers resigned from their posts in the Han Dynasty.