Prince Miguel of Braganza, Duke of Viseu (22 September 1878 – 21 February 1923) was a member of the exiled branch of the House of Braganza. The eldest son of the Miguelist pretender to the throne of Portugal he married an American heiress in 1909 and in 1920 renounced his rights to the throne. His full given names were Miguel Maria Sebastião Maximiliano Rafael Gabriel Gonzaga Francisco de Assis e de Paula Eustáquio Carlos Afonso José Henrique Alberto Clemente Inácio Martinho António Gerardo Jorge Emerico Maurício.