Thành Thái born Nguyễn Phúc Bửu Lân (阮福寶嶙), was the son of Emperor Dục Đức and Empress Dowager Từ Minh. He reigned as emperor for 18 years, from 1889 to 1907. Thành Thái was one of the three "patriotic emperors" in Vietnamese history, along with Hàm Nghi and Duy Tân, for their actions and views against French colonial rule in Vietnam.

Khải Định was the 12th emperor of the Nguyễn dynasty in Vietnam, reigning from 1916 to 1925. His name at birth was Prince Nguyễn Phúc Bửu Đảo. He was the son of Emperor Đồng Khánh, but he did not succeed him immediately.