Guy Georges Vĩnh San (born 31 January 1933), also Prince Nguyễn Phúc Bảo Ngọc, is a son of Vietnamese emperor Duy Tân who reigned from 1907 to 1916.

[3] During World War II, Duy Tân sided with Charles de Gaulle against the pro-German French government of Philippe Pétain.

"[4] Duy Tân served with De Gaulle's Free French and died in a plane crash in 1945, cutting short a planned return to Vietnamese politics.

Duy Tan was more popular than Emperor Bảo Đại and ranked higher in the genealogy of the Nguyễn Phúc clan.

[5] Bảo Đại's pro-Vichy government attempted to head off a claim to the throne by Georges by treating him as illegitimate.