historian (b. 1838) Martin Sheridan, American Olympic athlete (b. 1881), Spanish flu April April 1 Isaac Rosenberg, British war poet (killed in action) (b. 1890) Paul von Rennenkampf, Russian general (executed) (b. 1854) April 4 – Hermann Cohen, German philosopher (b. 1842) April 5 – King George Tupou II of Tonga (b. 1874), Spanish flu April 11 – Otto Wagner, Austro-Hungarian architect, urban planner (b. 1841) April 19 – William Hope Hodgson, English author (b. 1877) April 20 Karl Ferdinand Braun, German physicist, Nobel Prize laureate (b. 1850) Paul Gautsch von Frankenthurn, Austrian statesman, Prime Minister (b. 1851) April 21 Friedrich II, Duke of Anhalt (b. 1856) Manfred von Richthofen, German fighter pilot, top-scoring ace of World War I (killed in action) (b. 1892) April 27 – Jacques Duchesne, French general (b. 1837) April 28 – Gavrilo Princip, Yugoslav assassin (b. 1894) May May 2 Ernie Parker, Australian tennis champion (killed in action) (b. 1883) Jüri Vilms, Estonian politician (b. 1889) May 14 – James Gordon Bennett Jr., American newspaper publisher (b. 1841) May 17 – William Drew Robeson I, African-American minister, father of singer and actor Paul Robeson (b. 1844) May 18 – Maria Magdalena Merten, German Roman Catholic religious professed and blessed (b. 1883) May 19 Ferdinand Hodler, Swiss painter (b. 1853) Raoul Lufbery, Franco-American fighter pilot (killed in action) (b. 1885) May 23 – Mariano Ponce, Filipino diplomat, politician and writer (b. 1863) May 24 – József Kiss, Austro-Hungarian fighter pilot (killed in action) (b. 1896) May 30 – Georgi Plekhanov, Russian revolutionary, philosopher (b. 1856) June June 1 – Roderic Dallas, Australian fighter pilot (killed in action) (b. 1891) June 3 – Count Richard von Bienerth-Schmerling, Austrian noble, statesman and former Prime Minister (b. 1863) June 4 – Charles W. Fairbanks, 26th Vice President of the United States (b. 1852) June 10 – Arrigo Boito, Italian poet, composer (b. 1842) June 13 – Grand Duke Michael Romanov (assassinated) (b. 1878) June 15 – Frank Miles Day, American architect (b. 1861) June 16 – Bazil Assan, Romanian engineer and explorer (b. 1860) June 19 – Francesco Baracca, Italian fighter pilot (air crash) (b. 1888) June 25 – Jake Beckley, American baseball player, MLB Hall of Famer (b. 1867) June 26 – Kyrion II of Georgia, Georgian Orthodox religious leader, saint (b. 1855) June 27 – Joséphin Péladan, French occultist (b. 1858) July July 3 – Sultan Mehmed