soldier and Southern Unionist in Mississippi and Civil War guerrilla (b. 1829) February 23 – John Joseph Jolly Kyle, Argentine chemist (b. 1838). February 25 – Henri Désiré Landru, French serial killer (executed) (b. 1869) March March 1 – Pichichi, Spanish footballer (b. 1892) March 4 – Bert Williams, American entertainer (b. 1874) March 10 – Harry Kellar, American magician (b. 1849) March 19 – Max von Hausen, German general (b. 1846) March 21 – C. V. Raman Pillai, Indian novelist and playwright (b. 1858) March 31 – Andreas Gruber (b. 1859), Cäzila Gruber (b. 1850), Viktoria Gabriel (b. 1887), Cäzila Gabriel (b. 1915), Josef Gruber (b. 1920) and Maria Baumgartner (b. 1878). The Hinterkaifeck murders April April 1 – Emperor Charles I of Austria (b. 1887) April 2 – Hermann Rorschach, Swiss psychiatrist (b. 1884) April 8 – Erich von Falkenhayn, German general (b. 1861) April 9 Hans Fruhstorfer, German lepidopterist (b. 1866) Patrick Manson, Scottish physician (b. 1844) April 14 – Cap Anson, American baseball player, MLB Hall of Famer (b. 1852) April 28 – Paul Deschanel, President of France (b. 1855) May May 4 – Viktor Kingissepp, Estonian Communist politician (b. 1888; executed) May 7 – Max Wagenknecht, German composer (b. 1857) May 12 – John Martin Poyer, United States Navy Commander, 12th Governor of American Samoa (b. 1861) May 15 – Leslie Ward, English portrait artist, caricaturist (b. 1851) May 16 – Rudolf Montecuccoli, Austro-Hungarian admiral (b. 1843) May 18 – Charles Louis Alphonse Laveran, French physician, recipient of the Nobel Prize in Physiology or Medicine (b. 1845) May 19 – Son Byong-hi, Korean activist (b. 1861) May 21 – Michael Mayr, Austrian politician, 2nd Chancellor of Austria (b. 1864) May 26 – Ernest Solvay, Belgian chemist, philanthropist and entrepreneur (b. 1838) June June 4 – W. H. R. Rivers, English doctor (b. 1864) June 6 Lillian Russell, American singer, actress (b. 1861) Richard A. Ballinger, American politician (b. 1858) June 18 Jacobus Kapteyn, Dutch astronomer (b. 1851) Belgrave Ninnis, British explorer (b. 1837) June 20 – Vittorio Monti, Italian composer (b. 1868) June 21 – Take Ionescu, 29th Prime Minister of Romania (b. 1858) June 22 – Sir Henry Wilson, 1st Baronet, British field marshal and politician (b. 1864) June 23 - Wu Tingfang, Chinese Premier of the Republic of China (b. 1842) June 24 – Walter Rathenau, German statesman, Weimar Republic foreign minister (assassinated)