- Apr 1 Edward Austin Abbey, American painter (Quest of the Holy Grail mural at Boston Public Library), born in Philadelphia, Pennsylvania (d. 1911)
- Apr 12 Ferdinand von Lindemann, German mathematician (Proving π ["pi"] is a transcendental number), born in Hanover, German Confederation (now Germany) (d. 1939)
Frank Winfield Woolworth (1852-1919)
Apr 13 American businessman, retail pioneer (Five-and-Dimes; self-service display cases) and founder of F. W. Woolworth Co, born in Rodman, New York [1]
- Apr 14 Henrique Oswald, Brazilian composer, born in Rio de Janeiro (d. 1931)
- Apr 17 Cap Anson, American Baseball HOF first baseman (NL batting champion 1881, 88; 8 × NL RBI leader; Chicago White Stockings/Colts) and manager (Philadelphia A's, Chicago White Stockings/Colts, NY Giants), born in Marshalltown, Iowa (d. 1922)
- Apr 18 George Clausen, English painter, born in London (d. 1944)
- Apr 22 Guillaume IV, Grand Duke of Luxembourg (1905-12), born in Biebrich Palace, Wiesbaden, Duchy of Nassau (d. 1912)
- Apr 23 Edwin Markham, American poet (1st winner of American Acad of Poets Award 1937), born in Oregon City, Oregon (d. 1940)
- Apr 30 Charley Jones, American MLB Baseball outfielder, and one of the first sluggers, 1875-88 (Cincinnati Reds; Boston Red Caps, and 3 other teams), born in Alamance County, North Carolina (d. 1911)