Émile Zola (1840-1902)
Apr 2 French novelist and critic (J'accuse - I Accuse), born in Paris, France
- Apr 11 John Conrad Nordqvist, Swedish composer, born in Vänersborg, Älvsborg County, Sweden (d. 1920)
- Apr 12 Edmond Audran, French composer, born in Lyon, France (d. 1901)
- Apr 12 Franz Xaver Haberl, German priest and musicologist (Magister choralis), born in Mallersdorf-Pfaffenberg, Kingdom of Bavaria (d. 1910)
- Apr 20 Odilon Redon [Bertrand-Jean Redon], French symbolist painter, born in Bordeaux (d. 1916)
- Apr 25 James Dearing, U.S. Brigadier General (Confederate Army), born in Campbell County, Virginia (d. 1865)
- Apr 27 Edward Whymper, English mountaineer, 1st to climb Matterhorn (1865), born in London (d. 1911)
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