Does anyone know the function of surnames?

Don't be superstitious, it has nothing to do with the surname!

In fact, people's surnames were later produced according to the needs of life. People have given themselves surnames in their early years, which can be said to be hand-picked, which makes surnames have the randomness and diversity of sources. In people's life and communication, surnames come into being when they feel it necessary to have a title to remember who did what and who said what. Replacing people with addresses naturally takes place names as surnames. Japanese people are prominent, and their surnames are mostly derived from place names, such as the surnames of China people, such as shinya yamanaka, Tanaka, Kono, Nakamura, Kobayashi and so on.

Just to give a few examples: Xia, Shang, Zhou, Yu, Lu, Tang, Wei, Song, Qi, Liang, Chen, Xu, Cai, Hu, Lai, Huang, Zheng and other surnames came from ancient countries: Liu, Feng, Yang, Su, Ye, Zhong, Gan, Zhan, Bai, Bao, Ma. Lu, Pang, Mi, Pei, Meng, Qu are all ancient villages and towns. And the backer is Qiu, Shi, Shui, Jiang, Hai and Sha. Living near the Woods, of course, is Lin, Mu and Sen. When the local name dried up, people tried to find other ways. Many words used in ancestors' names are used as surnames, such as Fang, Zhang, Dong, Pan, Yuan, Shi, Sun, You, Kong, Niu and He. Brothers also have names such as Meng, Bo, Zhong, Shu and Ji.