- Apr 5 Alexander-Jozef von Battenberg, Prince of Bulgaria (1879-86), born in Verona, Kingdom of Lombardy-Venetia, Austrian Empire (d. 1893)
Arthur Wesley Dow (1857-1922)
Apr 6 American artist and educator, born in Ipswich, Massachusetts
- Apr 10 Henry Ernest Dudeney, English mathematician and puzzle maker, born in Mayfield, East Sussex, England (d. 1930)
- Apr 14 Edgar Stillman Kelley, American composer (Gulliver), born in Sparta, Wisconsin (d. 1944)
- Apr 14 Victor Horsley, English physician and neuroscientist, born in London (d. 1916)
- Apr 18 Clarence Darrow, American defense attorney at Scopes Monkey Trial, born in Kinsman, Ohio (d. 1938)
- Apr 19 Lucien Lévy-Bruhl, French scholar and philosopher, born in Paris (d. 1939)
- Apr 20 Charles Louis Philippe Zilcken, Dutch painter and author (HW Knife Day), born in The Hague, Netherlands (d. 1930)
- Apr 20 Hermann Bang, Danish writer, born in Asserballe, Denmark (d. 1912)
- Apr 23 Ruggero Leoncavallo, Italian composer (I pagliacci/Zaza), born in Naples, Kingdom of the Two Sicilies (d. 1919)
- Apr 29 Édouard Rod, France-Swiss writer (Mishel' Tes'e), born in Nyon, Switzerland (d. 1910)
- Apr 29 František Ondříček, Czech violinist and composer, born in Prague, Kingdom of Bohemia (d. 1922)
- Apr 30 Eugen Bleuler, Swiss psychiatrist (introduced the term schizophrenia to describe the disorder previously known as dementia praecox), born in Zollikon, Switzerland (d. 1940)
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