^Trần, Xuân Sinh (2003). Thuyết Trần. p. 403. https://books.google.co.jp/books?id=X4JuAAAAMAAJ&q. "...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..."
^Trần Trọng Kim (1919). “I.III.XI.”. Việt Nam sử lược. Vol.I. http://vi.wikisource.org/wiki/Việt_Nam_sử_lược/Quyển_I/Phần_III/Chương_XI. "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."