- Apr 1 Clementine Ogilvy Spencer-Churchill (Hozier), British barones
- Apr 3 St John Philby, British explorer and Arabist, born in Badulla, British Ceylon (d. 1960)
- Apr 3 Bud Fisher, American cartoonist (Mutt and Jeff), born in Chicago, Illinois (d. 1954)
- Apr 3 (Joseph Aloysius) "Allan" Dwan, Canadian-American screenwriter and film director (Robin Hood; Rebecca of Sunnybrook Farms; Sands Of Iwo Jima), born in Toronto, Ontario (d. 1981)
- Apr 5 Dimitrie Cuclin, Romanian composer, born in Galați County, Romania (d. 1978)
- Apr 6 Carlos Salzedo, French-American piano prodigy, harpist, composer, educator (Curtis Institue; Juilliard), and new music advocate (co-founder of International Composers' Guild), born in Arcachon, France (d.1961)
- Apr 6 Jules Goux, French auto racer (first European to win Indianapolis 500 1913), born in Valentigney, France (d. 1965)
- Apr 8 Dimitrios Levidis, Greek composer, born in Athens, Greece (d. 1951)
- Apr 12 Robert Delaunay, French artist, born in Paris, France (d. 1941)
- Apr 12 R. D. Banerji, Indian archaeologist and historian (discovered ancient Indus city of Mohenjo-daro), born in Berhampore, British India (d. 1930) [1]
- Apr 13 Pieter Sjoerds Gerbrandy, Dutch lawyer and Prime Minister of the Netherlands (1940-45), born in Goënga, Netherlands (d. 1961)
- Apr 13 Georg Lukács, Hungarian philosopher and literary critic, born in Budapest, Austria-Hungary (d. 1971)
- Apr 13 Vean Gregg, American baseball player, born in Chehalis, Washington (d. 1964)
- Apr 15 Tadeusz Kutrzeba, Polish general during the Second Polish Republic, born in Kraków, Galicia, Austria-Hungary (d. 1947)
- Apr 16 Leo Weiner, Hungarian composer (Fasching), born in Budapest, Austria-Hungary (d. 1960)
- Apr 16 Alexandre Stellio [Fructueux], Martinican biguine clarinetist, composer, and bandleader, born in Anses d'Arlet, Martinique (d. 1939)
- Apr 17 Cecil Burleigh, American composer, born in Wyoming, New York (d. 1980)
- Apr 17 Isak Dinesen [Karen Blixen-Finecke], Danish baroness and writer (Out of Africa), born in Rungsted, Zealand, Denmark (d. 1962)
- Apr 29 Egon Kisch, Austrian-Czech writer and journalist (Rasende Reporter), born in Prague (d. 1948)
- Apr 29 Wallingford Riegger, American cellist, composer (New Dance; Cooper Square), and educator, born in Albany, Georgia (d. 1961)
- Apr 30 Luigi Russolo, Italian Futurist composer (The Art of Noises), born in Portogruaro, Italy (d. 1947)