April 9 – Safvet-beg Basagic, Yugoslav writer (b. 1870) April 11 Gerald du Maurier, British actor (b. 1873) John Collier, British painter (b. 1850) April 15 – Karl Dane, Danish actor (b. 1886) April 18 – Raffaele Garofalo, Italian criminologist and jurist (b. 1851) April 21 - Carsten Borchgrevink, Anglo-Norwegian polar explorer (b. 1864) April 26 Arturs Alberings, 6th Prime Minister of Latvia (b. 1876) John Hamilton, Canadian gangster (b. 1899) April 27 – Joe Vila, American sportswriter (b. 1866) April 28 – Charley Patton, American Delta blues musician April 30 – Hugh L. Scott, Major General of the US Army (b. 1853) May May 12 - Gertrude Abbott Australian abbott (b. 1846) May 17 – Cass Gilbert, American architect (b. 1859) May 19 – Edward William Nelson, American naturalist (b. 1855) May 21 – James Durkin, Canadian-born American actor (b. 1879) May 23 Clyde Barrow, American outlaw, member of Barrow Gang (b. 1909) Bonnie Parker, American outlaw, member of Barrow Gang (b. 1910) May 24 – Brand Whitlock, American journalist and politician (b. 1869) May 25 – Gustav Holst, British composer (b. 1874) May 26 – Prince Alfonso, Count of Caserta (b. 1841) May 29 – Eugenie Besserer, American silent film actress (b. 1868) May 30 Tōgō Heihachirō, Japanese admiral (b. 1848) Julia Lopes de Almeida, Brazilian advocate and writer (b. 1862) May 31 – Lew Cody, American actor (b. 1884) June June 8 Dorothy Dell, American actress (b. 1915) June 9 – Medeiros e Albuquerque, Brazilian poet and politician (b. 1867) June 10 – Frederick Delius, British composer (b. 1862) June 11 – Lev Vygotsky, Russian developmental psychologist (b. 1896) June 19 – Prince Bernhard of Lippe (b. 1872) June 27 – Francesco Buhagiar, 2nd Prime Minister of Malta (b. 1876) June 30 – Murdered during the Night of the Long Knives: Karl Ernst, Nazi SA leader in Berlin (b. 1904) Fritz Gerlich, German journalist (b. 1883) Edmund Heines, Deputy SA leader (b. 1897) Gustav von Kahr, German politician (b. 1862) Kurt von Schleicher, 23rd Chancellor of Germany (b. 1882) Gregor Strasser, German Nazi politician (b. 1892) July July 1 Ernst Röhm, German politician, Nazi SA Leader (assassinated) (b. 1887) Edgar Jung, German lawyer and political activist (assassinated) (b. 1894) July 3 Emma Irene Åström, Finnish teacher, Finland's first female university graduate (b. 1847) Duke Henry of Mecklenburg-Schwerin, Dutch prince consort (b. 1876) July 4 Marie Curie, Polish-born