Kang surname is one of the more common surnames today, accounting for about 0.28% of the Han population in China, ranking 75th in China. Widely distributed, especially in Anhui, Sichuan, Gansu, Shandong, Shaanxi and other provinces, accounting for about 63% of the Han population in China. Kang's surname originated from Ji's surname, which can be traced back to the Western Zhou Dynasty more than 3,000 years ago. According to Historical Records, Wei Kangshu's family had a half-brother, Ji Feng, who was in Ji Fa, Zhou Wuwang, and was sealed in Kangcheng in the early years of the Western Zhou Dynasty, which was later Kang Shu. In the Eastern Zhou Dynasty, there was a man named Liu Kanggong, who was the same mother and brother of King Ding of Zhou. His surname was Kang, and later generations took this as their surname, also known as Kang. This Kang surname has a history of more than 2,600 years. In addition to the descendants of Ji surname, there is another important branch of the origin of Kang surname, that is, the comfortable country in the western regions that surrendered to China in the Han Dynasty. "Selected Biography of Liang Shukang" contains: "Chen Han sent servants to Hexi in the western region. Because he stayed, he later looked at Jingzhao, Dongping and Huiji. " This Kang family from the Western Regions appeared about 265,438+000 years ago, when the great man was spreading everywhere. Although it comes from a foreign country, it also has a long history. In the Song Dynasty, the population of the Kang family merged into a branch of the Kuang family. This is because in the early years of the Northern Song Dynasty, in order to avoid the name of Taizu, the surname "Kuang" was changed to the surname "Lord" with similar glyphs. However, during the political years, the court thought that the main surname could be the surname of all the people, so it was changed to "Kang" or "Zheng". Kang surname also exists widely among ethnic minorities. "Sui Shu" contains: "Turks also have the surname of Kang". In addition, Han surnames such as Nuzhen Nala nationality in Jin Dynasty, Hersejihara nationality in Manchu Eight Banners in Qing Dynasty, and Waliti nationality in Daur nationality include Kang, as well as Yao, Yi, Mongolian, Dongxiang, Tujia, Hui, Qiang and Korean.