"Maο" has the following origins: 1. It comes from the Ji surname and is derived from the name of a state. According to "Guangshao", in the early Western Zhou Dynasty, Shuzheng, an illegitimate son of King Wen of Zhou, was enfeoffed in the state of Mao (in the area of present - day Qixian and Fufeng, Shaanxi Province). He was known as Duke Mao, and his descendants adopted the surname Mao. The "Duke Mao Ding" is a relic of this state of Mao and is the bronze ware with the longest existing inscriptions. 2. It also comes from the Ji surname and is derived from the name of a fief. According to "Tongzhi - Clan Genealogy", Ming, a son of King Wen of Zhou, was enfeoffed in the Mao fief (in the area of present - day Yiyang, Henan Province). He was known as (Boming) and served as a court official and the Minister of Works in the Zhou royal court for generations. His descendants also took the surname Mao. 3. There were tribes in the north of Dai region, whose leaders were hereditary. According to "Records of the Former Qin Dynasty", there was a chieftain with the surname Mao.

"Origin of the surname 'Mao': It is derived from a state name and belongs to the 'Ji' clan. During the Western Zhou Dynasty, Mao Shu, the third son of Zhou Gongdan (the Duke of Zhou), who was a son of King Wen of Zhou, was enfeoffed in Mao (now southwest of Jinxiang County, Shandong Province) and established the State of Mao. Later, the State of Mao was conquered by the State of Zou. The descendants of the royal family of the State of Mao took 'Mao' as their surname to commemorate their former state."