Boun Oum
Prince Boun Oum (also Prince Boun Oum Na Champassak) (December 12, 1912 - March 17, 1980) was the son of King Ratsadanay, and was the hereditary prince of Champassack (replaced the "king" system) and also Prime Minister of Laos.
Read more about Boun Oum: Early Life, Prime Minister