- Mar 1 Henri de Baillet-Latour, Belgian aristocrat (3rd President International Olympic Committee 1925-42), born in Brussels, Belgium (d. 1942)
Pius XII (1876-1958)
Mar 2 260th Roman Catholic Pope (1939-58), born in Rome, Kingdom of Italy
- Mar 4 Léon-Paul Fargue, French poet (d. 1947)
- Mar 4 Theodore Hardeen, Magician and stunt performer, founder of the Magician's Guild (d. 1945)
- Mar 5 Elizabeth Moore, American tennis player (US Nat C'ship 1896, 1901, 03, 05), born in Brooklyn, NY (d. 1959)
- Mar 7 Edgar Evans, Welsh explorer (part of Robert Scott's Terra Nova Expedition to Antarctica), born in Rhossili, Wales (d. 1912)
- Mar 8 Franco Alfano, Italian opera composer (Puccini's Turandot), born in Posillipo, Italy (d. 1954)
- Mar 10 Edvard Eriksen, Danish-Icelandic sculptor, born in Copenhagen, Denmark (d. 1959)
- Mar 11 Carl Ruggles, American composer (Evocations), born in Marion, Massachusetts (d. 1971)
- Mar 11 David Wijnkoop, Dutch revolutionary socialist, born in Amsterdam, Netherlands (d. 1941)
- Mar 16 Charles Halton, British stage actor (Dr Cyclops, Tugboat Annie Sails Again), born in Washington, D.C. (d. 1959)
- Mar 17 Frederic Ayers, American composer, born in Binghamton, New York (d. 1926)
- Mar 20 Payne Whitney, American businessman (d. 1927)
- Mar 21 John Tewksbury, American athlete (d. 1968)
- Mar 23 Muirhead Bone, Scottish etcher and painter (WWI & WWII war artist), born in Glasgow, Scotland (d. 1953)
- Mar 26 Prince William of Wied, Prince of Albania (1914-25), born in Neuwied, German Empire (d. 1945)
- Mar 29 Joseph Schmidlin, German church historian and antifascist, born in Petit-Landau, France (d. 1941)
- Mar 30 Clifford Whittingham Beers, American mental hygiene pioneer, born in New Haven, Connecticut (d. 1943)
- Mar 31 Borisav "Bora" Stanković, Serbian writer (d. 1927)