Yu surname source: (1) takes the country name as the surname. According to the "surname test", there was a worry about the country in ancient times, which was taken by Dr. Wu in the Spring and Autumn Period. Shandong Pingdu Jiaodong is located in Yuzhi County, and it is named after a place name. (2) According to the compilation of Yuanhe surnames, there was a Yu Huang in the State of Lu in the Spring and Autumn Period, followed by a Yu family.
Yu surname source: (1) from Ji surname. Take the country name as the surname. According to Guang Yun and Yuan He's Compilation, the third son was sealed in Zhi country, called Zhi Shu, and later went to town as Zhi and Zhi's. (2) It was changed by the compound surname of Xianbei nationality. (3) According to the dialectics of ancient and modern surnames, Chunyu Kun changed his surname to Shi Yu in the Tang Dynasty to avoid the name of Li Chun in Tang Xianzong.
Yu's Origin: According to Genealogy, there was a veterinarian (Fu) in ancient times as the beginning of Yu's family. See historical records.