What is the relationship between Shi Si and Sima Shi?

When Shennong was the leader of ancient tribes, there was a special divination minister named Siguai, and his descendants took Gu Si as their surname and called Gu Si. During the Spring and Autumn Period, there was a doctor named Zheng whose grandson took his ancestral son as his surname. It is a branch of the company. After careful study, the descendants of Si surname became the ancestors of Si surname. During the Spring and Autumn Period, there was a doctor, Uncle Hu, in the State of Jin, who was sealed in the Miao State and established the Miao State. There was also a noble minister, who was later named Si. During the Spring and Autumn Period, there was a count named Cheng Bo, Guo Cheng. When he divorced his father, he was Sima of the Zhou royal family and was awarded the title of official, so his descendants were surnamed Si. During the Spring and Autumn Period, Wei State had a son Ying, whose descendant was Wei Sikou, and later generations took the official as their surname, and later changed it to a single surname. In history, the descendants of Si De and Si De, who had a compound surname, also changed to Si, a single surname, called Si.

surname

The first origin: from the official position, from Cheng Boxiu, the minister in charge of military power in the Western Zhou Dynasty, belonging to the official surname. In ancient times, some people valued Li, who was an official in charge of heaven and earth. I used to care about Li. During Zhou Xuanwang's period, Cheng Bo divorced his father and went to Sima's house to be an official, in charge of the national army, and assisted the government with great power. Later, Cheng Boxiu's father, Ke Ping and Xu Fang, made great contributions. Zhou Xuanwang allowed him to take his official position as his surname, and later he became a Sima. The second origin: from the birth surname, it comes from Si Marui, the emperor of Jin and Yuan Dynasties, who changed his surname to surname for some reason, or changed his surname to surname by official title. This branch of the Sima family came from the Jin Emperor Si Marui. Formerly known as Niu, it was later renamed Sima due to status problems. Its descendants also became the Sima family, passed down from generation to generation. [This is a legend] The third origin: from changing the surname, from the surname of Ji Xu to the surname of Hao, it belongs to changing the surname for some reason. Xu Mu and Hao Yun, some of their descendants somehow changed to Sima. Ancestor of surname: Cheng Bo divorced his father. According to the history book Genealogy, Sima's ancestor was the father of Bai Sima (an official in charge of military and political affairs and campaigns) during his administration. Because of his repeated meritorious military service, he was given Sima's surname, and later generations took Sima as his surname. Cheng Bo's father was a vassal in the Yin and Zhou Dynasties and was handed down by the descendants of Zhu Rong's family after Zhuan Xu Emperor in ancient times. Some descendants of Cheng Bo's divorced father took Guan as their surname and changed their surname to Sima. Some follow the custom of "taking the country as the surname" to become the surname. Therefore, the Sima family is the Cheng family, and the Cheng family is a family. Sima's family is about 2700 years ago. The descendants of Sima regarded Cheng Bo's father as the ancestor of Sima.