1, from the Spring and Autumn Period, after Qin Youyu, took the ancestral name as the surname. According to "Customs Pass", Yu's surname is "Hou, who lives in Zhangzhou and belongs to Xin 'an, so be careful." "In the Spring and Autumn Period, there was a doctor named Yu Yu in the State of Qin. His ancestors were Jin people who avoided chaos in Xirong. Yu Yu used to be an official in Xirong, and later he was ordered to go to the State of Qin. Seeing Qin Mugong's virtue and generosity, he stayed in Qin as a minister. He planned to conquer Xirong for Mu Gong and make A Qin the western hegemon. His descendants take his name as their surname, and some are called You's; Some are surnamed Yu, called Yu, and the two surnames are the same.
2. From the surname, Han Han, my youngest son, was named Yu. According to the surname test, Yu Xia was followed by Yu Shi. Dayu has three sons, the eldest son Qi, surnamed Si, and the youngest son Han, surnamed Yu, and his descendants passed down as Yu. Yu's wife is the daughter of Tushan in Shaoxing. In memory of her, Yu named her youngest son Yu.
3. From the ethnic point of view, there is a surname named Kui after the five surnames. According to Guoyu, "Lu, Luo, Quan, Yu and Man all have five surnames."
He came from another family and changed his surname:
(1) According to Yu's genealogy, Yu in Zhenxiong County, Yunnan Province claimed to be changed by Temujin's compound surname, and was a descendant of the ancestor Genghis Khan (Temujin), from the family of Prime Minister Temujin. There is a poem to prove it: "Yu Ben was the Prime Minister of Yuan Dynasty, and Hong Bing was driven to the Western Ocean ... The prequel poem said that the meeting of the heirs was his own family". According to legend, Prime Minister Temujin was a loyal minister, and Taizu listened to rumors and wanted to capture his nine sons and a son-in-law alive. Nine sons and a son-in-law went out of the city at night and fled to Guizhou. When they saw Mao leading the pursuers, they hid under the Jin Feng Bridge. When the pursuers arrived, someone saw the waves surging under the bridge and raised doubts. Mao did not study it carefully, but casually said, "There is water in the river and fish in the water. Why all the fuss? Go ahead and catch up quickly. " After the ten Tiemu brothers fled, they originally wanted to change Tiemu into gold, and finally decided to change it into Yu. "Fish" is smaller than the golden character, and it is also the homonym of "fish in the water", which is a pun. However, according to many historians' research, this Yu surname actually came from the Tangut Qiang people in Xixia, and its ancestor was Yu Que, the governor of Anqing at the end of Yuan Dynasty, and his kin. He lived in Luzhou (now Hefei, Anhui), fled to Sichuan after the Red Army uprising, and moved to Yunnan and Guizhou in the Qing Dynasty. Most of the contents contained in his genealogy are inconsistent with historical facts, and he lied that his ancestors were Temujin in Yuan Taizu, collectively known as Tiegaishiyu.
(2) When the Yi people use fish as a totem to dig for mercy, the Han surname is the rest.
(3) Yue, later renamed Yu.
④ The Han surnames of Baima Tibetans in Sichuan and Gansu are Ru Yan, Reze and Peiru.
⑤ Yumer of Xibe nationality, Han surname is Yu.
⑥ Other ethnic groups such as Miao, Yi, Buyi, Manchu, Tujia, Bai, Bao 'an and Qiang all have this surname.
Ancestor: Yu Yu. During the Spring and Autumn Period, doctors in the State of Qin were also in surplus. Their ancestors were originally Jin people and fled to Xirong (the collective name of ancient northwest ethnic minorities). After serving in Xirong, he was ordered to go to Qin. Seeing Qin Mugong's virtue and generosity, he left Qin as a relative and won the trust of Mu Gong. As one of many vassal states, the Qin Dynasty was not prominent. After Yu Yu became a supernatant, it was not expected by Mu Gong. He helped Qin Mugong plan to attack Xirong, destroy twelve countries, expand thousands of miles and dominate Xirong, and finally made Qin Mugong one of the five tyrants in the Spring and Autumn Period. Yu once laid a solid foundation for the prosperity of Qin and the unification of the world, and later generations were proud of it, so they took his word as their surname and respected him as their ancestor.