The emperor Duy Tan died at the age of 46. Here is all you want to know, and more!
Biography - A Short Wiki
Former child emperor who belonged to the Nguyen Dynasty in Vietnam. He ruled for nine years between 1907 to 1916. He was deposed and exiled after he attempted to lead a revolution against the French. He died in a plane crash on his way back to Vietnam to become Emperor once again.
His father was emperor, Thành Thái, who was declared insane and exiled because of his anti-French sentiments.