Surname Overview
Surname Status and Ethnic Affiliations
The source explicitly classifies Cun as a relatively rare surname currently used in China and states that it occurs among Bai, Han, and Lisu people; it therefore should not be presumed to belong to a single ethnic group.
Reference: 寸姓_寸姓的来源和历史_百家姓
Historical Records
Documentary Listings
This secondary compilation says that the surname is included in Xu Tongzhi and the clan section of Qing Tongzhi, and relays a quotation from Xingshi Xunyuan through Xingshi Kaolue: “Among the indigenous people of Langqiong in Yunnan there is the surname Cun.” These are secondary reports, not direct verification of the original works.
Reference: 寸姓_寸姓的来源和历史_百家姓
Notable People
Historical Figure: Cun Yu
During the Ming dynasty, Cun Yu served in the Honglu Temple theatrical troupe and as a professor at the Siyiguan. He also went on a mission to Myanmar and contributed to ancient Sino-Myanmar relations.
Reference: 寸姓_寸姓的来源和历史_百家姓