- Mar 4 Bernhard Kellermann, writer
- Mar 5 Walter Long, American actor (Moby Dick, Sheik, Sea Devils, Dragnet Patrol), born in Nashua, New Hampshire (d. 1952)
- Mar 5 Sir William Beveridge, British economist (d. 1963)
- Mar 8 Mechtilde Lichnowsky, German writer, born in Pocking, Bavaria (d. 1958)
- Mar 8 Otto Hahn, German physicist and chemist (Nobel 1944, radiothorium/actinium), born in Frankfurt, Germany (d. 1968)
- Mar 11 Justus Hermann Wetzel, composer
- Mar 11 Niels Bjerrum, Danish chemist (ph tests)
Albert Einstein
Mar 14 Albert Einstein, German-born theoretical physicist and Nobel laureate (theory of relativity), born in Ulm, German Empire (d. 1955)
Albert Einstein
- Mar 15 Gerrit J Heering, Dutch theologist (Fall of Christianity)
Cluny MacPherson
Mar 18 Cluny MacPherson, Canadian doctor and inventor of the gas mask, born in St. John's, Newfoundland (d. 1966)
Cluny MacPherson
- Mar 19 Joseph Haas, German (opera)composer (Tobias Wunderlich)
- Mar 20 Maud Menten, Canadian biochemist (d. 1960)
- Mar 25 Otakar Zich, Czech composer, born in Městec Králové (d. 1934)
- Mar 26 Othmar Ammann, Swiss-American bridge engineer, born in Schaffhausen, Switzerland (d. 1965)
- Mar 27 Edward Steichen, American photographer, born in Luxembourg (d. 1973)
- Mar 27 Miller Huggins, American baseball player and manager, born in Cincinnati, Ohio (d. 1929)
- Mar 30 Coen de Koning, Dutch ice skater (d. 1954)