François Marie Gabriel André Charles-Ferdinand Roelants du Vivier (born 5 November 1947) is a Belgian politician and a member of Ecolo and later the FDF (Francophone Democratic Federalists). He is part of the political family Nothomb; his grandfather is Pierre Nothomb and his ancestors include Jean-Baptiste Nothomb, who helped draft the Belgian Constitution and served as Prime Minister. Roelants du Vivier started his career in Ecolo, and was a Member of the European Parliament elected in 1984 and serving until 1989. From 1994 until 2000 he was also municipal councillor in Uccle.