Analysis of information sources in references of the Wikipedia article "List of Vietnamese dynasties" in English language version.
...Quý Ly claims Hồ's ancestor to be Mãn the Duke Hồ [Man, Duke Hu], founding meritorious general of the Chu dynasty, king Ngu Thuấn's [king Shun of Yu] descendant, created his country's name Đại Ngu...
Dream Pool Essays volume 25
Classical Chinese :桓死、安南大亂、久無酋長。其後國人共立閩人李公蘊為主。
— 夢溪筆談 卷25 Chinese Wikisource has original text related to this article: 夢溪筆談/卷25
Quí Ly deposed Thiếu-đế, but respected [the relationship] that he [Thiếu Đế] was his [Quí Ly's] grandson, only demoted him to prince Bảo-ninh 保寧大王, and claimed himself [Quí Ly] the Emperor, changing his surname to Hồ 胡. Originally the surname Hồ [胡 Hu] were descendants of the surname Ngu [虞 Yu] in China, so Quí Ly created a new name for his country Đại-ngu 大虞.