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There is a certain rule in ancient people's naming: names are related to words. Some meanings are related, some are complementary, and some are opposite. In addition, the names and characters of the ancients are often taken from classic ancient books.
For example, the names and characters are taken from ancient books: Cao Cao's word Meng De, and "De" and "Cao Cao" are taken from the sentence "The husband calls virtue" in Xunzi. Zhou Yu's words, Zhu Gejin's words, "gold" and "jade" are all beautiful jade. There is a saying in Zuo Zhuan's Fifteen Years of Gong that "the present conceals flaws, and the monarch contains dirt".
Names and characters have similar meanings: Zhuge Liang's "Kongming", "Ming" and "Liang" all refer to sufficient light, while Zhang Liao's "Wen Yuan" and "Liaohe" have distant meanings.
Names and characters complement each other: Liu Bei's word is Xuande, which is deep and secluded, and Xuande is Xuande, and the name is supplemented by words.
Names and characters have opposite meanings: Liu Chan's characters are male heirs, Zen position and heir position, one is allowed and the other is inherited.