This is mainly due to the cultural differences between the East and the West. In particular, China has been a country of etiquette since ancient times, so it pays more attention to things.
When Chinese people in ancient times chose names, they attached great importance to the principle of "avoiding taboos". First, they should avoid relatives of the royal family, secondly, they should avoid their fathers and ancestors, and thirdly, they should avoid historical celebrities.
The main reason for avoiding the emperor's relatives, especially the emperor's name, is that in ancient times, the emperor was the "true emperor" and his status was revered, which was beyond the reach of ordinary mortals. Before the prince ascends the throne, his name may be the same as that of many common people. However, after the prince ascends the throne and becomes the emperor, the common people must change their names and cannot have the same name as the emperor.
On the one hand, this is to demonstrate the royal identity, and on the other hand, it is also to reflect the authority of the monarch.
Avoiding fathers and ancestors means that when naming children and grandchildren, they cannot have the same name as their father or grandfather. This is a sign of disrespect. In ancient times, children were usually named by their fathers, so fathers would avoid naming their children the same as their ancestors of the same clan.
The main reason why we avoid historical celebrities is because of the inherent humility of the Chinese people, who believe that their talents and virtues are not worthy of being compared with those of the ancients. We see that for thousands of years, there has not been another scholar named Confucius. There is also a kind of celebrity who is "notorious", such as Qin Hui, who framed Yue Fei. Later generations "are ashamed to be named Qin and ashamed to be named Hui", so they avoid them.
On the contrary, the West and China like to name their names after great people, such as "Caesar" and "Joan of Arc". We always feel that these names are named after two very powerful figures, but In fact, in Europe, these two names are so common that they are almost as popular as "Aqiang" and "Cuihua".
So when Westerners name names, they often just pass it on from one generation to the next, which is not as particular as the East.