– Helen Zimmern, German-born British writer and translator (b. 1846) January 15 – Hermann Bahr, Austrian writer and playwright (b. 1863) January 16 – Henry Walter Barnett, Australian photographer and filmmaker (b. 1862) January 21 – Aref Qazvini, Iranian poet, lyricist and musician (b. 1882) January 22 – Robert Brady, American criminal (b. 1904) January 23 – Charles McLaren, 1st Baron Aberconway, Scottish politician and jurist (b. 1850) January 29 – Fritz Haber, German chemist, Nobel Prize laureate (b. 1868) February February 2 – Maria Domenica Mantovani, Italian Roman Catholic religious professed and blessed (b. 1862) February 3 – Eleonora de Cisneros, American opera singer (b. 1878) February 5 – William Morris Davis, American geographer (b. 1850) February 9 – Claudio Williman, 20th President of Uruguay (b. 1861) February 17 – King Albert I of Belgium (b. 1875) February 19 - Caleb Bradham, American pharmacist, inventor of Pepsi (b. 1867) February 21 – Augusto César Sandino, Nicaraguan revolutionary and rebel (murdered) (b. 1895) February 23 Sir Edward Elgar, British composer (b. 1857) Geevarghese Dionysius of Vattasseril, Indian Orthodox priest and saint (b. 1858) February 25 – John McGraw, American baseball manager and MLB Hall of Famer (b. 1873) March March 1 Wilhelm Diegelmann, German actor (b. 1861) Charles Webster Leadbeater, British author and Theosophist (b. 1854) March 2 - John Smith Archibald, Canadian architect (b. 1872) March 7 - John Hamilton-Gordon, 1st Marquess of Aberdeen and Temair, Scottish politician, Governor General of Canada (b. 1847) March 14 João do Canto e Castro, Portuguese army officer, 67th Prime Minister of Portugal and 5th President of Portugal (b. 1862) Prince Sixtus of Bourbon-Parma (b. 1886) March 15 – Davidson Black, Canadian-born paleoanthropologist (b. 1884) March 19 – Edward Montagu-Stuart-Wortley, British army general (b. 1857) March 20 Emma of Waldeck and Pyrmont, Dutch Queen and regent (b.1858) Sydney Deane, Australian cricketer and actor (b. 1863) March 21 Nicanor Abelardo, Filipino composer (b. 1873) Lilyan Tashman, American actress (b. 1896) March 27 – Francis William Reitz, 5th president of the Orange Free State (b. 1844) March 28 – Mahmoud Mokhtar, Egyptian sculptor (b. 1891) March 29 – Otto Hermann Kahn, German-born philanthropist (b. 1867) March 30 Paul Cazeneuve, French politician (b. 1852) Ronald Munro Ferguson, 1st Viscount Novar, Scottish politician, 8th Governor-General of Australia (b. 1860) April April 7 Béatrice Ephrussi de Rothschild, French socialite (b. 1864) Karl von Einem, German general (b. 1853)