1921-1980. Botswanan politician, prime minister of Bechuanaland 1965 and first president of Botswana from 1966 until his death. Son of the Bamangwato chief Sekoma II (died 1925), Khama studied law in Britain and married an Englishwoman, Ruth Williams. This marriage was strongly condemned by his uncle Tshekedi Khama, regent during his minority, as contrary to tribal custom, and Seretse Khama was banished 1950. He returned 1956 on his renunciation of any claim to the chieftaincy.