– Hermann von François, German general (b. 1856) May 16 – John Henry Mackay, German writer (b. 1864) May 19 – Thomas J. O'Brien, American politician, diplomat (b. 1842) May 22 – Sándor Ferenczi, Hungarian psychoanalyst (b. 1873) May 24 Ludovic Arrachart, French aviator (b. 1897) Percy C. Mather, British Protestant missionary (b. 1882) Rosslyn Wemyss, 1st Baron Wester Wemyss, British admiral (b. 1864) May 26 Horatio Bottomley, British politician and businessman (b. 1860) Jimmie Rodgers, American country singer (b. 1897) June June 2 – Frank Jarvis, American athlete (b. 1878) June 7 – Cyrus H. K. Curtis, American publisher (b. 1850) June 15 - Hildegard Burjan, German Roman Catholic nun and blessed (b. 1883) June 18 - Harry Sweet, American actor and director (b. 1901) June 21 - Halbert Benton Cole, Georgetown University Law School Alumni, American Attorney in Black River Falls, Wi and Hamilton, Montana (b. 1879)Cole, H.B. June 25 Jean Cugnot, French Olympic cyclist (b. 1899) Giovanni Giacometti, Swiss painter (b. 1868) June 29 – Roscoe Arbuckle, American actor, comedian, film director and screenwriter (b. 1887) July July 3 Hipólito Yrigoyen, 18th President of Argentina (b. 1852) Franz Wilhelm Seiwert, German painter, sculptor (b. 1894) July 6 - Robert Kajanus, Finnish conductor and composer (b. 1856) July 11 - Edward Dillon, American actor, director (b. 1879) July 15 Irving Babbitt, American literary critic (b. 1865) Freddie Keppard, American jazz musician (b. 1890) Léon de Witte de Haelen, Belgian general (b. 1857) July 18 – Charles Prince, French actor (b. 1872) July 27 – Nobuyoshi Mutō, Japanese field marshal, ambassador (b. 1868) August August 1 – Sulejman Delvina, Albanian politician, 5th Prime Minister of Albania (b. 1884) August 10 – Alf Morgans, Australian politician, 4th Premier of Western Australia (b. 1850) August 13 – Hasan Prishtina, Albanian politician, 8th Prime Minister of Albania (b. 1873) August 18 – James Williamson, British film director (b. 1855) August 22 – Alexandros Kontoulis, Greek general (b. 1858) August 23 Marie Cahill, American singer, actress (b. 1866) Adolf Loos, Austrian-Czechoslovak architect (b. 1870) August 30 – Kustaa Ahmala, Finnish politician (b. 1867) September September 2 – Francesco de Pinedo, Italian aviator (b. 1890) September 7 – Edward Grey, 1st Viscount Grey of Fallodon, British statesman (b. 1862) September 8 – King Faisal I of Iraq (b. 1885) September 10 – Giuseppe Campari, Italian opera singer, Grand Prix driver (b. 1892) September 17