凯山·丰威汉
Kaysone Phomvihane (; 13 December 1920 – 21 November 1992) was the first leader of the Communist Lao People's Revolutionary Party from 1955 until his death in 1992. After the Communists seized power in the wake of the Laotian Civil War, he was the "de facto" leader of Laos from 1975 until his death. He served as the first Prime Minister of the Lao People's Democratic Republic from 1975 to 1991 and then as the second President from 1991 to 1992.