– Georg Cantor, German mathematician (b. 1845) January 8 Johannes Pääsuke, Estonian photographer, filmmaker (b. 1892) Ellis H. Roberts, American politician (b. 1827) January 9 Max Ritter von Müller, German World War I fighter ace (killed in action) (b. 1887) Charles-Émile Reynaud, French inventor (b. 1844) January 10 – María Dolores Rodríguez Sopeña, Spanish Roman Catholic religious sister and blessed (b. 1848) January 21 – Emil Jellinek, German automobile entrepreneur (b. 1853) January 26 – Grand Duke Nicholas Konstantinovich of Russia (b. 1850) January 28 – John McCrae, Canadian soldier, surgeon and poet (b. 1872) January 31 – Ivan Puluj, Ukrainian physicist and inventor (b. 1845) February February 1 – Princess Leonilla Bariatinskaya, Russian aristocrat (b. 1816) February 2 – John L. Sullivan, American boxer, World Heavyweight Champion (b. 1858) February 4 Akiyama Saneyuki, Japanese admiral (b. 1868) Jeannette Walworth, American journalist and novelist (b. 1835) February 5 – Leonard Monteagle Barlow, British fighter pilot (accident) (b. 1898) February 6 – Gustav Klimt, Austrian painter (b. 1862), Spanish flu February 8 – Louis Renault, French jurist, educator and Nobel Prize laureate (b. 1843) February 10 Sultan Abdul Hamid II of the Ottoman Empire (b. 1842) Ernesto Teodoro Moneta, Italian pacifist, Nobel Prize laureate (b. 1833) February 11 – Alexey Kaledin, Russian general (suicide) (b. 1861) February 14 – Sir Cecil Spring Rice, British diplomat (b. 1859) February 15 – Vernon Castle, American dancer (b. 1887) February 16 – Károly Khuen-Héderváry, 2-time Prime Minister of Hungary (b. 1849) February 23 Adolphus Frederick VI, Grand Duke of Mecklenburg-Strelitz (b. 1882) Thomas Brassey, 1st Earl Brassey, British politician and colonial administrator (b. 1836) March March 2 – Prince Mirko of Montenegro (b. 1879) March 9 – Frank Wedekind, German playwright (b. 1864) March 10 Hans-Joachim Buddecke, German flying ace (killed in action) (b. 1890) Jim McCormick, Scottish-born American baseball player (b. 1856) March 13 – César Cui, Lithuanian composer (b. 1835) March 14 Lucretia Garfield, First Lady of the United States (b. 1832) Gennaro Rubino, Italian anarchist who unsuccessfully tried to assassinate King Leopold II of Belgium (b. 1859) March 15 – Adolf Ritter von Tutschek, German fighter ace (killed in action) (b. 1891) March 23 – T. P. Cameron Wilson, English poet, novelist (b. 1888) March 25 Claude Debussy, French composer (b. 1862) Walter Tull, first Black infantry officer to serve in the British Army (b. 1888) March 27 Henry Adams, American