(b. 1795) March 4 – Alexander Campbell, Irish/U.S. founder of the Disciples of Christ (b. 1788) March 6 – William Whewell, English scientist, philosopher and historian of science (b. 1794) March 20 – Rikard Nordraak, Norwegian composer (b. 1842) March 21 – Nadezhda Durova, first female Russian military officer (b. 1783) March 24 – Maria Amalia of Naples and Sicily, Queen of France (b. 1782) March 28 – Solomon Foot, American politician (b. 1802) March 29 – John Keble, British churchman (b. 1792) April 1 – Elizabeth Jesser Reid, English social reformer, founder of Bedford College (b. 1789) April 4 – William Dick, founder of Edinburgh Veterinary College (b. 1793) April 5 – Thomas Hodgkin, British physician (b. 1798) April 7 – Johann Sedlatzek, German flautist (b. 1789) April 12 – Peter Hesketh-Fleetwood, English Member of Parliament and developer (b. 1801) May 13 – Nikolai Brashman, Russian mathematician of Czech origin (b. 1796) May 29 – Winfield Scott, American general and presidential candidate (b. 1786) June 7 – Chief Sealth, Native American for whom Seattle is named (b. c. 1786) June 17 – Lewis Cass, American military officer, politician, and statesman (b. 1782) July–December July 20 – Bernhard Riemann, German mathematician (b. 1826) July 25 – Floride Calhoun, Second Lady of the United States (b. 1792) July 29 – Madame Clicquot Ponsardin, French champagne producer (b. 1777) August 1 – John Ross, long-serving principal chief of the Cherokee Nation, of natural causes, in Washington D. C. (born 1790 in Cherokee Nation East). August 6 – Christian Eric Fahlcrantz, Swedish writer (b. 1790) August 20 – Maria De Mattias, Italian Catholic saint (b. 1805) August 29 – Tokugawa Iemochi, 14th shōgun of the Tokugawa shogunate of Japan (b. 1846) September 4 – Theresa Pulszky, European author (b. 1819) September 30 – Per Gustaf Svinhufvud af Qvalstad, Swedo-Finnish treasurer of Tavastia province, manor host, and paternal grandfather of President P. E. Svinhufvud (b. 1804) October 13 – Celadon Leeds Daboll, American merchant and inventor (b. 1818) October 18 – Manuel Bulnes, Chilean general and politician, President of Chile (b. 1799) November 11 – Agustín Jerónimo de Iturbide y Huarte, Prince Imperial of Mexico (b. 1807) November 14 – King Miguel I of Portugal (b. 1802) November 26 – Jean-Jacques Willmar, Luxembourg politician (b. 1792) December 1 – George Everest, Welsh geodesist (b. 1790) December 21 – William J. Fetterman, United States Army