4 – Giovanni Battista Grassi, Italian physician and zoologist (b. 1854) May 5 – Catharine van Tussenbroek, Dutch physician (b. 1852) May 7 William Lever, 1st Viscount Leverhulme, British industrialist, philanthropist and politician (b. 1851) Sir Doveton Sturdee, British admiral (b. 1859) May 10 Alexandru Marghiloman, 25th prime minister of Romania (b. 1854) William Massey, 19th prime minister of New Zealand (b. 1856) May 12 Amy Lowell, American poet (b. 1874) Charles Mangin, French general (b. 1866) May 13 – Alfred Milner, 1st Viscount Milner, British politician and colonial administrator (b. 1854) May 14 – H. Rider Haggard, British writer (b. 1856) May 15 – Nelson A. Miles, American general (b. 1839) May 20 Ramón Auñón y Villalón, Spanish admiral and politician (b. 1844) Elias M. Ammons, Governor of Colorado (b. 1860) Joseph Howard, 1st Prime Minister of Malta (b. 1862) May 21 – Hidesaburō Ueno, Japanese agricultural scientist and guardian of Hachikō (b. 1871) May 22 – John French, 1st Earl of Ypres, British World War I field marshal (b. 1852) May 25 – Karl Abraham, German psychoanalyst (b. 1877) May 28 – João Pinheiro Chagas, Prime Minister of Portugal (b. 1863) May 29 – Percy Fawcett, British explorer, anthropologist and archaeologist (disappeared) (b. 1867) May 31 – John Palm, Curaçao-born composer (b. 1885) June June 1 Lucien Guitry, French actor (b. 1860) Thomas R. Marshall, 28th Vice President of the United States (b. 1854) June 2 – James Ellsworth, American mine owner and banker (b. 1849) June 3 – Camille Flammarion, French astronomer (b. 1842) June 9 – Antony MacDonnell, 1st Baron MacDonnell, Irish civil servant (b. 1844) June 12 – Mary Cole Walling, American patriot, lecturer (b. 1838) June 16 – Emmett Hardy, American jazz cornetist (b. 1903) June 17 – Adolf Pilar von Pilchau, Baltic German politician, regent of the United Baltic Duchy and baron (b. 1851) June 18 – Robert M. La Follette, American politician (b. 1855) June 20 – Josef Breuer, Austrian neurologist (b. 1842) June 22 – Felix Klein, German mathematician (b. 1849) June 28 – Georgina Febres-Cordero, Venezuelan nun (b. 1861) June 29 – Christian Michelsen, Norwegian politician and 1st Prime Minister of Norway (b. 1857) July July 1 – Erik Satie, French composer (b. 1866) July 2 – Nikolai Golitsyn, last Prime Minister of the Russian Empire (executed) (b. 1850) July 4 – Pier Giorgio Frassati, Italian Roman Catholic social activist