What is the origin of the surname "Ji"?

The origin of "Ji" is: 1, which was changed from the surname and is one of the oldest "surnames" in China. According to the Book of Tang Dynasty: Descendants of Prime Ministers, there was a descendant of the ancient Yellow Emperor named Bo who was sealed in Nanyan State (in the northeast of Yanjin County, Henan Province). Later, his descendants neglected his daughter and became Ji's surname, which was passed down from generation to generation. At present, the population of Ji surname is 2.03 million. 2. From Ji's surname, with Zuzi as the surname. According to Yuanhe's surname password, there was a saint named Yin Jifu in ancient Zhou Xuanwang, and his descendants took Zuzi as their surname, which was passed down from generation to generation. Several sources of the increase of Ji surname: 1. Among the Han people's compound surnames, some have changed their surnames to Ji. More than 2.300 years ago, after Manchu, a descendant of the Jurchen nationality, entered the Central Plains, some Manchu banners changed their surnames to "Ji". For example, Ji Siha, a general who made great achievements in Qing Tiancong's years, was originally named Wusu, a native of Zhengbaiqi, Manchuria; Qing Ji, governor of Guangdong and Guangxi during Jiaqing period of Qing Dynasty, was born in Zhengbaiqi, Manchuria and other places. 3. In Qing Dynasty, Jibao, the toast of Xining, Qinghai, was a native of Xifan, and his descendants also took Ji as their surname. 4. At the junction of Qiongzhong, Baoting and Laoting counties in Hainan, there are 72 Li people without surnames, which were later unified as Ji by the general manager. 5. Tujia, China's surname is also Ji. 6. Today, among Mongolian, Yi, Hui, Tibetan, Kazak, Korean, Dai and other ethnic groups, some people take Ji as their surname. The surname is the ancestor Botong. According to the records of ancient books and documents, we can also see the humble status of Yan State. The lineage of the monarch of the State of Yan is from Zhao Gong to Yan Huihou, with nine generations unknown in the middle and none after Yan Huihou. The historical events of Yan State were not recorded until more than 100 years after the Spring and Autumn Period at the latest. The first major event recorded was that Qi Shan Rong passed through Yan State, and the second major event was that the monarch fled to Qi State with the help of Qi historians. At that time, there was a Yan State named Wa in Jixian County, Henan Province, which was called Southern Yan in history. At first, the monarch's name was Bo and his surname was Wa. According to Zuo Zhuan, the Southern Yan State is called Yan and the Northern Yan State is called Yan, but the history of the Southern Yan State is much earlier than that of the Northern Yan, which is often recorded. After Bo Yan's descendants left their daughters, they were called Ji, and their surnames were passed down from generation to generation. Therefore, the descendants of Ji respect their ancestors.