Origins
Surname Derived from Offices
Two origins of the Yu (庾) surname are associated with offices: one traces it to the official in charge of yu granaries under Emperor Yao, whose descendants adopted the office title as their surname; the other traces it to Zhou officials called yulin who managed granaries, whose descendants were granted the surname for generations of meritorious service.
Reference: 庾氏源流与迁徙分布-族谱网
Historical Records
Record in Xing Zuan
Xing Zuan records that under Emperor Yao there was an official called the Zhangyu Dafu and that the surname was taken from this office; it also associates the surname with Yingchuan and Xinye.
Reference: 庾姓_庾姓的来源_庾姓族谱_姓氏庾姓的名人_庾氏家谱_百家姓
Commanderies and Clan Halls
Commanderies and Hall Names
Commandery associations of the Yu surname include Yingchuan, Jiyang, and Xinye. Its principal hall names include Yingchuan Hall, Xinye Hall, and Jiyang Hall.
Reference: 庾姓_庾姓的来源_庾姓族谱_姓氏庾姓的名人_庾氏家谱_百家姓
Migration and Distribution
Distribution and Migration to Guangdong
Yu descendants are found in Guangxi, Hunan, Jiangxi, Gansu, Shanxi, Shaanxi, Jiangsu, Shanghai, and Yunnan. One Guangdong branch moved from Nanjing to Guangdong during the Northern Song Yuanyou era, later settled at Yujiafang in Chayuan, Dongguan, and around the twenty-fifth year of the Hongwu reign moved to Guyong before branching to Qishi Village in Xianyong.
Reference: 庾氏源流与迁徙分布-族谱网
Notable People
Yu Xin
Yu Xin, courtesy name Zishan, was a Northern Zhou writer from Xinye in Nanyang. He served as Kaifu Yitong Sansi and was known as “Yu Kaifu.” Skilled in poetry, fu, and parallel prose, he is especially noted for the late work Lament for the South.
Reference: 《百家姓》第343姓:庾,庾姓来源、分布地域与名人介绍 | 速查君
Genealogy and Generation Names
Recorded Genealogies
Recorded genealogies include the movable-type Xiang-Ba Yu Genealogy, comprising three volumes plus one introductory volume and printed in the twenty-first year of the Guangxu reign, and the 1999 letterpress Yu Clan Gazetteer: Jiangxi, Guangdong, Hunan, and Guangxi Volume, which compiles genealogies of ten lineages across those four provinces.
Reference: 庾氏家谱网 提供2个省区市的4部庾氏家谱、庾氏族谱