Why did the emperor of China's feudal dynasty allow common people to be named Long?
Since ancient times, in order to express the nobility and uniqueness of the emperor, people have always been unable to use the characters in the emperor's name when naming them. For example: the name of Emperor Gaozu of the Tang Dynasty was Li Yuan. During his reign, no one except the royal family Except for the clan aristocrats, no one can be named after these two characters.
The dragon is the representative of the emperor, so the image of the dragon is used on the nobles of the royal family (not just the emperor!). But each dynasty also has a national surname. For example, the national surname of the Tang Dynasty is Li, the national surname of the Qing Dynasty is Aisin Gioro, the national surname of the Ming Dynasty is Zhu, etc.
It can be seen that unless the emperor of that dynasty has the character dragon in his name, it actually does not matter if the people have the surname dragon.
Extra little knowledge p.s: The dragon on the emperor's dragon robe is a five-clawed golden dragon, which is Pan Long. However, the dragons on the clothes of other clan nobles or officials personally gifted by the emperor can only have four claws, which is a python. Volume 47 of "The Qing Dynasty Huidian": python robes, princes and princes, embroidered with nine pythons. From Baylor down to the third-rank civil and military officials, the prince's consort, the general of Fengguo, and the first-class bodyguard, all have nine pythons and four claws. Officials of the fourth, fifth and sixth grades of civil and military affairs, generals of Feng'en, consorts of county princes, and second-class bodyguards, have eight pythons and four claws. He is of the seventh, eighth or ninth rank in civil and military affairs, has not yet become an official, and has five pythons and four claws.
Volume 13778 of "Manuscripts of Qing History": Prince: The python robe is golden yellow, with a gold edge, embroidered with nine pythons, and the train is open on the left and right. (Initially made, the prince's crown and attire. When celebrating a grand ceremony, the crown is inlaid with thirteen East beads, the dress is made of autumn fragrance and other colors, five-clawed, three-clawed dragon satin, full of eight-cup dragon satin, etc., and is bundled with gold and jade and inlaid with East beads. bead belt).