Nauruan politician who was at the centre of political life on the central Pacific island for more than 30 years, notably as the first elected president of Nauru following its independence in 1968.

After attending Geelong Technical College in Australia, DeRoburt returned to his native island to teach (1940). When the Japanese invaded Nauru in 1942, he was deported along with most of the population to Truk (now Chuuk) in Micronesia until 1946. As a member of the local government council (from 1955) and head chief (from 1965), he led the negotiations for local control over Nauru's immensely rich phosphate industry and for political independence from Australia, which administered the island as a United Nations-mandated trust territory. He was president from 1968 to 1989, except for a two-year span (1976–78) when he was voted out of office and for a brief period in late 1986 when he was temporarily ousted by government opponents. In 1982 he was awarded an honorary knighthood by Queen Elizabeth II.