1. Liu's surname originated from Ji's surname and was formed in the Spring and Autumn Period.

2. The earliest branch originated from the surname Qi, and was a descendant of Emperor Yao, which was formed in the late summer.

3. Change the surname: Xiang Yu's uncle Xiang Bo was given the surname Liu Bang because he helped Liu Bang at the Hongmen banquet.

Famous historical figures include Liu Bang, Liu Heng and Liu An.

The surname Liu is widely distributed, but it is not balanced. Liu is one of the most common surnames in North China and the Central Plains. The distribution frequency of Liu's surname in the crowd shows that in most areas of Liaoning, Jilin, Heilongjiang, eastern Inner Mongolia, Hebei and northwestern Shandong, Liu's surname generally accounts for more than 7% of the local population, and its coverage area accounts for12.1%of the total land area; In a large number of north and south areas east of Qinghai and west of Zhejiang, the distribution frequency of Liu surname is 4.2%-7%, and its coverage area accounts for 38.6% of the total land area; In Zhejiang, southern Jiangsu, most of Fujian, Taiwan Province, central Guangdong, southern Hainan, southwestern Yunnan, western Sichuan and eastern Qinghai, the distribution frequency of Liu's surname is 1.4%-4.2%, and its coverage area accounts for 2 1.5% of the total land area. The distribution frequency of Liu surname in other areas is less than 1.4%, and its coverage area accounts for 27.8% of the total land area.