- Apr 1 Richard Adolf Zsigmondy, Austrian-born chemist (1925 Nobel Prize for Chemistry for work colloids), born in Vienna, Austria-Hungary (d. 1929) [1]
- Apr 8 Ted Wainwright, English cricket all-rounder (5 Tests; Yorkshire CCC), born in Sheffield, England (d. 1919)
- Apr 9 Charles Proteus Steinmetz, German-American electrical engineer (development of alternating current), born in Breslau, Province of Silesia, Prussia (d. 1923)
Erich Ludendorff (1865-1937)
Apr 9 German general during World War I, born in Kruszewnia, Prussia
- Apr 10 Jack Miner, Canadian naturalist and conservationist, born in Dover Center, Ohio (d. 1944)
- Apr 11 Mary White Ovington, American journalist, suffragist, and co-founder of the NAACP, born in Brooklyn, New York (d. 1951)
- Apr 13 Heinrich Reinhardt, Austrian composer, born in Pressburg, Austrian Empire (now Bratislava, Slovakia) (d. 1922)
- Apr 16 Harry Chauvel, Australian Imperial Force senior officer, born in Tabulam, New South Wales, Australia (d. 1945)
- Apr 17 Ursula Ledóchowska, Polish-Austrian Catholic saint and foundress of the Ursulines of the Agonizing Heart of Jesus, born in Loosdorf, Austrian Empire (d. 1939)
- Apr 23 Ali-Agha Shikhlinski, Russian-Azerbaijani general, born in Kazakhli, Russian Empire (d. 1943)
- Apr 26 Akseli Gallen-Kallela, Finnish painter known for his illustrations of the Kalevala, the Finnish national epic, born in Pori, Finland (d. 1931) [1]
- Apr 28 Charles W. Woodworth, American entomologist, born in Champaign, Illinois (d. 1940)
- Apr 30 Max Nettlau, German anarchist and historian, born in Neuwaldegg, Austria (d. 1944)
Greatest Generation
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