of the Nguyễn Tựu family records that their surname was originally Vũ (武) but was later changed to Nguyễn (阮) due to Lê dynasty regulations. [Because of that, they changed the surname Vũ to Nguyễn. (因丕買𢬭武𫜵阮; Nhân vậy mới đổi Vũ làm Nguyễn)There have been various points in Vietnam's history at which people have changed their family name to Nguyễn. When the
Lý dynasty fell in 1232,
Trần Thủ Độ, who orchestrated its overthrow, forced descendants of the Lý dynasty to adopt the name due to the
naming taboo surrounding Trần Lý, grandfather to emperor
Trần Cảnh. From 457 to
Hồ Quý Ly (1401), in Hải Dương and a part of
Haiphong today there is the district of the Phí family (Vietnamese: ). At the end of the Lý and the
Trần dynasty there were many people who changed their names to Nguyễn and Nguyễn Phí. By the
Lê dynasty, the court changed the name of the district to Kim Thành. When the
Mạc dynasty fell in 1592, their descendants changed their family name to Nguyễn.
Trần Quang Diệu (like his wife
Bùi Thị Xuân) worked as a major officer for the
Tây Sơn dynasty, against
Nguyễn Ánh. After the Tây Sơn dynasty was defeated, his children adopted various names or changed names (one of them into Nguyễn) in order to flee retaliation. Contrary to the popular belief that Vietnamese rulers have allowed courtiers to adopt their family name as a sign of loyalty, it was in fact a serious taboo to assume the imperial surname without legitimate lineage. Individuals who improperly adopted the imperial surname could face severe penalties, including forced name changes, removal from public office, exile, or even
capital punishment. This policy was rooted in the
naming taboo tradition, and was explicitly reaffirmed through imperial edicts. This popular myth is often used to explain the high prevalence of the surname Nguyễn in modern Vietnam, attributing it to the influence of the Nguyễn dynasty (1802–1945) as the country's last dynasty. However, the surname of the ruling dynasty was
Nguyễn Phúc (阮褔), not only Nguyễn (阮). In 1841,
Nguyễn Văn Tường (阮文祥), originally named Nguyễn Phúc Tường (阮褔祥), participated in the
civil examination. Emperor
Thiệu Trị (紹治) ordered his name be removed from the list of graduates, changed it to Nguyễn Văn Tường, and handed him over to the
Censorate for punishment. As a result, Tường was sentenced to one year in exile. Additionally, the education officials at the provincial, prefectural, and district levels, as well as officials of the Imperial Academy, examination officials, the Ministry of Rites, and the Censorate were all demoted and punished accordingly. Here is an excerpt from
Veritable Records of the Great South (; Đại Nam thực lục): ==Notable people==