Why were the names of people in the Three Kingdoms period 1?

The ancients "shaved in March, named it". Every generation has different naming methods. Shang Dynasty was often named after heavenly stems and earthly branches, such as Pan Geng. During the Spring and Autumn Period and the Warring States Period, or in the name of animals, such as Touch Dragon, Xiang Yan and Ximen Bao; Or in the name of ugliness; Or in the name of a profession, such as mechanic, Shi Kuang, Wheel Edge, Youmeng, etc. During the Wei and Jin Dynasties, the word "zhi" was used well, such as Wang Xizhi and Wang Xianzhi.

As for the length of the name, it also changes slowly. You must have noticed that China people's names have single-word names first, and then double-word names (including modern people's names, generally speaking, there are more double-word names). The appearance of two-character names enriches the content and meaning of names, and provides more space for personalized names in modern words. No matter how it changes, the roles are nothing more than those.

Things always have a process of change, and the Three Kingdoms period is just at the stage when that word name is still dominant. If you pay attention, you will still find that some people in the Three Kingdoms are double-word. To put it bluntly, the phenomenon you mentioned was popular at that time, that is, habit, and there was no special reason.