- Apr 7 Henry Eagle, Commander (Union Navy), (d. 1882)
- Apr 11 Claude Tillier, French journalist and writer (My Uncle Benjamin), born in Clamecy, Nièvre, France (d. 1844)
- Apr 12 Henry de Cock, Dutch reformed vicar and secession leader, born in Veendam, Groningen, the Netherlands (d. 1842)
- Apr 12 Joseph Franz Karl Lanner, Austrian composer and violinist, born in Vienna, Austria (d. 1843)
- Apr 19 Gustav Fechner, German philosopher and physicist (Weber–Fechner law), born in Żarki Wielkie, Poland (d. 1887)
- Apr 26 Ambrose Dudley Mann, American diplomat, born in Hanover Courthouse, Virginia (d. 1889)
Greatest Generation
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