The source of the surname of Kan: ① Zuo Chuanyun: In the Spring and Autumn Period, the state-owned doctors in Song Dynasty took food from Kan, and later took the city name as their surname; In the Song Dynasty, there was a land, so we should take the land as our surname. ② China Surname Dictionary (edited by Wang Zonghu, Chen Mingyuan): from the surname of the child. During the Spring and Autumn Period, the state-owned doctors in the Song Dynasty collected food from Kanyi (in the north of Shanxian County in Shandong Province), and later took the name of the city as their surname. ③ Contemporary Hundreds of Surnames (edited by Wang Daliang): The surname Kan is a surname from an ancient place name. According to legend, there was a place name called Kan in the Song State in the Spring and Autumn Period, which was located at the junction of Jinxiang and Chengwu in Shandong Province. Later, it became the jurisdiction of Lu State and became a doctor's food city. The doctor who lived in Kan came from the Duke of Lu and was also of the same origin as the royal family of Zhou Dynasty. Because he was named by his surname, he later took the name of this food city as his surname, thus becoming a surname of Kan.
Historical figure: Jian Libing; Kan Chongsi, our envoy to Hedong during the first year of Tang Dynasty.