Joao Augusto de Araujo Castro (August 27, 1919, Rio de Janeiro – December 9, 1975, Washington, D.C.) was a Brazilian lawyer and diplomat, serving as Brazilian Ambassador to the US and UN, and Minister of Foreign Affairs during the government of João Goulart. 1919 births 1975 deaths People from Rio de Janeiro (city) Foreign ministers of Brazil Brazilian diplomats Permanent Representatives of Brazil to the United Nations Ambassadors of Brazil to the United States