- Dec 4 Bob Shawkey, American baseball pitcher (World Series 1923, 27; AL ERA leader 1920, New York Yankees), born in Sigel, Pennsylvania (d. 1980)
- Dec 4 Jack Darragh, Canadian Hockey Hall of Fame right wing (Stanley Cup 1911, 20-21, 23; Ottawa Senators), born in Ottawa, Ontario (d. 1924)
- Dec 5 David Bomberg, English painter, born in Birmingham, England (d. 1957)
- Dec 5 Fritz Lang, Austrian-German-American filmmaker and screenwriter (Metropolis), born in Vienna, Austria (d. 1976)
Dion Fortune (1890-1946)
Dec 6 British occultist and author (Psychic Self-Defence, The Mystical Qabalah), born in Llandudno, Wales
- Dec 6 Rudolf Schlichter, German artist and writer, born in Calw, Germany (d. 1955)
- Dec 6 Yoshio Nishina, Japanese physicist (known as the founding father of modern physics research in Japan), born in Satoshō, Okayama (d. 1951)
- Dec 8 Bohuslav Martinů, Czech, composer (Hry o Marti), born in Polička, Bohemia (d. 1959)
- Dec 10 George Merritt, English actor (I Monster, Q Planes), born in London, England (d. 1977)
Carlos Gardel (1890-1935)
Dec 11 Argentine singer and the most prominent figure in the history of tango, born in Buenos Aires, Argentina
Marc Connelly (1890-1980)
Dec 13 American playwright (One Minute Please), born in McKeesport, Pennsylvania
- Dec 18 Edwin Howard Armstrong, American radio pioneer inventor (FM), born in NYC, New York (d. 1954)
- Dec 19 Klaas Schilder, Dutch theologist and vicar (Reformed Churches in the Netherlands (liberated)), born in Kampen, Netherlands (d. 1952))
- Dec 20 Yvonne Arnaud, French-born pianist, singer and actress (Yvonne Arnaud Theatre), born in Bordeaux, Gironde, Aquitaine, France (d. 1958)
- Dec 21 Hermann Joseph Muller, American geneticist and Nobel laureate, born in NYC, New York (d. 1967)
- Dec 22 Harry Pollitt, General Secretary of the Communist Party of Great Britain, born in Droylsden, United Kingdom (d. 1960)
- Dec 22 Mark Tobey, American abstract painter (Broadway Norm), born in Centerville, Wisconsin (d. 1976)
- Dec 25 Robert Ripley, collector of odd facts (Believe it or Not), born in Santa Rosa, California (d. 1949)
- Dec 26 Uncle Charlie Osborne, American fiddler (d. 1992)
- Dec 27 Maurice Schoemaker, Belgian progressive classical composer (Feu d’Artifice - Fireworks), born in Anderlecht, Belgium (d. 1964)
- Dec 28 Frank Butler, American actor and screenwriter (Road to Bali, China), born in Oxford, England (d. 1967)
- Dec 30 Adolfo Ruiz Cortines, President of Mexico (d. 1973)
- Dec 30 Charles Cyril "Charlie" Creath, American jazz trumpeter, saxophonist, accordionist, and bandleader, born in Ironton, Missouri (d. 1951)