Actually, it’s not that no one is named “槧”, it’s just that very few people are named “槧”. For example, during the Jiajing period of the Ming Dynasty, there was a minister named Sun Hui. A famous history professor at Beijing Normal University is named Wang Huilin. Currently, these are the only two people I know with names like "槧". I think there are very few people named "Hui" for the following reasons:
Qin Hui is one of the famous treacherous ministers in Chinese history. Legend has it that during the Qianlong period, Qin Jianquan, the number one scholar (i.e. Qin Da Shi, Jianquan was his nickname), was the favorite student of the famous poet Yuan Mei. One day, Qin Jianquan went to visit the West Lake with his friends. When they arrived in front of Yue Fei's tomb, everyone saw Qin Hui kneeling in front of the tomb and couldn't help but write poems and talk about it. Someone noticed that Qin Jianquan was silent and deliberately pulled him to write a couplet on Qin Hui's kneeling statue. Although Qin Jianquan was happy in his heart, he could not refuse. When he was at a loss, Yuan Mei helped him by saying the first couplet "People were ashamed to be named Hui after the Song Dynasty". Qin Jianquan received "I am ashamed to be named Qin when I go to the grave." , with the help of Yuan Mei, the siege was solved. Later Qin Jianquan wrote a complete couplet, which has been handed down to this day.
It can be seen from this story that since the Southern Song Dynasty, people hated Qin Hui and were even more ashamed to have the same name and surname as him. Therefore, few people were named "Hui".
Extended information:
Qin Hui (1090-1155), courtesy name Huizhi, was born in Huangzhou and his native place is Jiangning (now Nanjing, Jiangsu). In the early years of the Southern Song Dynasty, he was the prime minister and treacherous minister, a representative of the Zhuhe faction, and one of the famous treacherous ministers in Chinese history.
Reference materials: Qin Hui_Baidu Encyclopedia Wang Huilin_Baidu Encyclopedia Qin Dashu_Baidu Encyclopedia