PARANAGUA, Francisco Yillela Barbosa (pah-rah-nah-gwah'), Marquis of, Brazilian statesman, born in Rio Janeiro, 20 November, 1769; died there, 11 September, 1846. He was graduated in mathematics at the University of Coimbra in 1796, entered the royal navy at Lisbon in 1797, and served for four years, participating in the siege of Tunis and in the capture of Algerian pirates in the Mediterranean. He was appointed in 1801 assistant professor of the Royal naval academy, but asked to be transferred to the engineer corps, which he entered with the rank of lieutenant, and was for some time an assistant professor of astronomy and navigation, and afterward professor of geometry. He returned to Brazil in 1823, and when the success of the Portuguese revolution of 1820 was followed by the meeting of the constituent assembly he was appointed a member of that body. After the independence of Brazil was declared, Barbosa was appointed minister of the navy in December, 1829, but he became unpopular and resigned in 1831. In 1840 he was president of the senate, and exerted all his influence to declare Pedro II. of age, and from 1841 till 1843 he held again the portfolio of the navy. He wrote " Elementos de Geometria" (Lisbon, 1815); "Urn pequenho tratado sobre Geometria Spherica" (1817); and an essay, " Sobre a Correccao das Derrotas da Estima," which was awarded a prize and published by the Royal geographical society of Lisbon (1818). He wrote also many poetical compositions, including odes, sonnets, and cantatas, which circulated among his friends and gained him some reputation as a poet.