The word Ji was first seen in Xiao Zhuan in Qin Dynasty, and then gradually evolved into a simplified version of Ji in regular script. The basic meaning of the word "Ji" is the name of a mountain, such as Ji Mountain.

The extended meaning of "Ji" is the surname. Xia Houshi Ji surname family: Ji surname originated from Yi surname, and Yi surname originated from Ji surname. The surname of Huangdi is Ji. Changyi, son of Huangdi, Levin, son of Zhuan Xu, son of Gun, Yu, son of Qi, son of Xiang, son of Shao Kang, this bastard was sealed in Huiji to commemorate Yu's sacrifice. Tattoos have broken hair and covered it with grass. After more than twenty lifetimes, as for the permission. When Chang was allowed, he fought with the prince of Wu and hated each other. Allow the regular pawn, the clause is established, and it is the king of Yue. His descendants are called Huiji, so he takes Jiji as his surname.