author and essayist (b. 1851) June 27 Karl Allmenröder, German World War I fighter ace (killed in action) (b. 1896) Gustav von Schmoller, German economist (b. 1838) June 29 – Frans Schollaert, 19th Prime Minister of Belgium (b. 1851) June 30 Antonio de La Gándara, French painter (b. 1861) Dadabhai Naoroji, Indian politician (b. 1825) July–September July 2 William Henry Moody, 35th United States Secretary of the Navy, 45th United States Attorney General, and Associate Justice of the Supreme Court of the United States (b. 1853) Sir Herbert Beerbohm Tree, British actor (b. 1852) July 8 – Tom Thomson, Canadian painter (b. 1877) July 12 Donald Cunnell, British World War I fighter ace (killed in action) (b. 1893) Hugo Simberg, Finnish symbolist painter and graphic artist (b. 1873) July 15 – Andrey Selivanov, Russian general and politician (b. 1847) July 16 – Philipp Scharwenka, Polish-German composer (b. 1847) July 20 – Ignaz Sowinski, Polish architect (b. 1858) July 27 – Emil Theodor Kocher, Swiss medical researcher, recipient of the Nobel Prize in Physiology or Medicine (b. 1841) July 28 – Ririkumutima, Queen regent of Burundi July 31 Francis Ledwidge, Irish poet (killed in action) (b. 1887) Hedd Wyn, Welsh poet (killed in action) (b. 1887) August 3 – Ferdinand Georg Frobenius, German mathematician (b. 1849) August 7 – Edwin Harris Dunning, British aviator (b. 1892) August 13 – Eduard Buchner, German chemist, Nobel Prize laureate (b. 1860) August 17 – John W. Kern, American Democratic politician (b. 1849) August 20 – Adolf von Baeyer, German chemist, Nobel Prize laureate (b. 1835) August 30 – Alan Leo, British astrologer (b. 1860) September 9 Boris Stürmer, Russian prime minister (b. 1848) Madge Syers, British figure skater (b. 1881) September 11 – Georges Guynemer, French World War I fighter ace (missing in action) (b. 1894) September 15 – Kurt Wolff, German World War I fighter ace (killed in action) (b. 1895) September 23 – Werner Voss, German World War I fighter ace (killed in action) (b. 1897) September 26 – Edward Miner Gallaudet, American educator of the deaf (b. 1837) September 27 – Edgar Degas, French painter (b. 1834) September 30 – Patricio Montojo y Pasarón, Spanish admiral (b. 1839) October–December October 3 – Eduardo di Capua, Neapolitan composer and songwriter (b. 1865) October 4 – Dave Gallaher, New Zealand rugby union football player (killed in action) (b. 1873) October 9 – Sultan