The word generation of Yuanjia in Pengzhou, Sichuan Province is only now known, but I don't know what it is.

Yu (Yú), one of the surnames in China, is one of the most populous surnames in China, ranking 39th, and has the greatest influence in Shandong and Northeast China. This is a typical family name from Yan Di and Huangdi, which spread from the Yellow River valley to the whole country.

The main source of the surname Yu is:

1, from the surname Ji, is a descendant, and takes the country name as the surname. According to the New Tang Book Prime Minister's Pedigree Table, in the early years of the Western Zhou Dynasty, after the Shang Dynasty, Zhou Wuwang made great efforts to enfeoffment the vassal, and his second uncle was sealed in Zhi State. Later, the descendants of Zhi Shu took the country as their surname, some took Zhi as their surname, and some went to town to take Yu as their surname and Henan as their surname. During the Spring and Autumn Period and the Warring States Period, there was chaos, and the descendants of Zhi Shu moved to Tancheng, Shandong Province, becoming Yu's family in Shandong Province.

2. Since ancient times, Emperor Yan's surname, Jiang, is a descendant of Chunyu Kun, a writer. In the Tang Dynasty, he changed his surname from Emperor Xianzong's Spring Calendar. According to the dialectics of ancient and modern surnames, the descendants of Chunyu take the country name as their surname, which is called Chunyu's surname. During the Zhenguan period of the Tang Dynasty, the royal family had seven surnames, including Chunyu. To Li, in order to avoid taboo ("pure" and "chun" homophonic), the compound surname Chunyu was changed to single surname Yu. In the Song Dynasty, some Yu surnames were restored to Chunyu surnames, while others remained unchanged, forming a branch of Yu surnames.

3. In the early years of the Northern Wei Dynasty, Wan Yu and Shi Yu changed their surname from Shi Yu in the Central Plains to Pingcheng in order to avoid the chaos of the Three Kingdoms, and returned to their original names during the localization reform of Emperor Xiaowen. According to "History of Taoism", Wanwanyu of Xianbei nationality was originally a Shandong Yu family, and later changed with Xianbei customs. Emperor Xiaowen reformed in Chinese and returned to his surname. In fact, they are descendants of Yu Gong in Han Dynasty. During the Three Kingdoms War, in order to survive in Xianbei, they left the Central Plains with their domineering neighbors and changed their surname to Wan Yu. Later, Tuoba GUI, a Xianbei nationality, established the Northern Wei Dynasty in northern China, and then returned to the Central Plains. Many Yu people who live in the north, even the Yu people who moved to the whole country, belong to this family.

4. Change the surname from the given surname or minority nationality.

(1) Bayan Dali was the surname in the Ming Dynasty, and the southern part of Nimaha was changed to this surname in the Qing Dynasty.

(2) Some ethnic minorities such as Daur, Oroqen, Tu, Hui and Korean changed their surnames.

At present, the population of Yu surname has reached 6.42 million, which is the 39th surname in China, accounting for about 0.48% of the national population. The distribution in China is mainly concentrated in Shandong, Liaoning, Heilongjiang, Jilin, Hebei and Henan provinces, accounting for 7 1.9% of the total surname population, followed by Jiangsu and Inner Mongolia, with 9. 1% of the surname population. Shandong is the largest province in the Yu family, accounting for 2 1.8% of the total population. Shandong has been the residence of the Yu family for thousands of years. With Shandong and Liaoning as the center, it forms the second largest surname residential area in China. The surname population radiates around and gradually decreases, with more surnames in Jiangbei and fewer surnames in Jiangnan.