After Gu's surname, "North Gu" did not develop as well as "South Gu", and South Gu soon became the most popular surname in Huiji (now Wuxian, Suzhou). During the Han, Wei and Six Dynasties, they were called Huiji four surnames together with Lu, Zhu and Zhang.
Because Gu's surname mainly originated from and grew up in Huiji, Huiji became one of the counties with Gu's name. Later, the Gu family moved to Wuling (now Wuling West, Suzhou) and developed rapidly, so Wuling became another county of Gu family.
Gu Yanwu
Extended data:
Migration distribution
After taking care of his surname, North Gu developed less than South Gu. During the Spring and Autumn Period and the Warring States Period, the two Gu surnames developed slowly. According to some data, Nan Gude's family name soon became the most popular surname in Huiji (now Suzhou), and it was called Huiji four surnames together with Lu, Zhu and Zhang in the Han, Wei and Six Dynasties.
Because Gu's surname mainly originated and developed in Huiji (Wuxian County, Jiangsu Province), Huiji was regarded as one of Gu's name counties in history. In addition, this family was later moved to Wuling (now Wuling West, Suzhou), which developed rapidly in the local area, so Wuling was honored as another big county of family.
In the middle of Ming Dynasty, Gu lived not only in Anhui, Hubei, Hunan, Fujian, Guangdong and Sichuan, but also in Shandong, Shanxi, Shaanxi, Hebei and Inner Mongolia in the north. From the end of Ming Dynasty to the middle of Qing Dynasty, Gu family of Fujian and Guangdong crossed the sea to Taiwan Province, and then moved overseas.
1949, Chiang Kai-shek was defeated and fled to Taiwan Province province, and many people followed him in Jiangsu and Zhejiang provinces. However, throughout the family history of Gu surname, the development and reproduction center of Gu surname has been in today's Jiangsu and Zhejiang provinces.
Baidu Encyclopedia-Gu surname