Prince Boun Oum (also Prince Boun Oum Na Champassak; Lao: ບຸນອຸ້ມ ນະ ຈຳປາສັກ; Thai: บุญอุ้ม ณ จัมปาศักดิ์; RTGS: Bun-um Na Champasak; 2 December 1911 – 17 March 1980) was the son of King Ratsadanay, and was the hereditary prince of Champassak and also Prime Minister of the Kingdom of Laos from March 1949 to February 1950 and again from December 1960 to June 1962.He succeeded on the death of his father as Head of the Princely House of Champassak, June 1946.[2] Titular leader of the royalist faction (and one of the Three Princes of the Kingdom of Laos), he served as Prime Minister of the Kingdom of Laos from March 1949 to February 1950 and again from December 1960 to June 1962[1] when The National Assembly installed him by unanimous vote.He retired from politics to pursue business interests from his base in Pakse and Champassak but continued to be a major power broker until his exile in 1975, the year the communist Pathet Lao came to power.He died in Boulogne-Billancourt, France in 1980 and his ashes are buried at the Cimetiere de Trivaux in Meudon France, next to his wife Princess Bouaphanh na Champassak (1920–2013).