Here's why:
* Historical Significance: The Tang Dynasty (618-907 AD) was one of the most prosperous and influential periods in Chinese history. Many people adopted the Tang surname during or after this dynasty.
* Geographical Distribution: The Tang surname is most prevalent in China, particularly in the southern provinces.
* Chinese Origin: The surname Tang itself is derived from a place name in ancient China.
However, it's important to note that:
* Variations and Migrations: The Tang surname can also be found in other countries due to migration and cultural exchange.
* Different Origins: It's possible that the Tang surname could have different origins in other parts of the world, though it's less common.
Therefore, while the Tang surname is primarily associated with China, it's not exclusively limited to that country.