- Apr 4 Edward Cary Walthall, American Brigadier General (Confederate Army), born in Richmond, Virginia (d. 1898)
- Apr 8 Allard Pierson, Dutch theologist, philosopher and art historian, born in Amsterdam (d. 1896)
- Apr 12 Constantin Meunier, Belgian painter and sculptor, born in Etterbeek, Belgium (d. 1905)
- Apr 12 George B. Anderson, American Brigadier General (Confederate Army), born in Hillsborough, North Carolina (d. 1862)
Grenville M. Dodge (1831-1916)
Apr 12 American railroad engineer (Transcontinental Railroad-Union Pacific) and Major General (Union Army), born in Danvers, Massachusetts