- Jan 1 Wilhelm Canaris, German admiral and head of German military intelligence (executed for opposing Hitler), born in Aplerbeck, Germany (d. 1945)
- Jan 3 August Macke, German painter (d. 1914)
- Jan 3 Helen Parkhurst, American educator (The Dalton Plan), born in Durand, Wisconsin (d. 1973)
- Jan 10 Robinson Jeffers, American poet & playwright (Tamar & Other Poems, Medea), born in Allegheny, Pennsylvania (d. 1962)
- Jan 11 Aldo Leopold, American conservationist, professor and co-founder of the Wilderness Society, born in Burlington, Iowa (d. 1949)
- Jan 11 Monte Blue, American silent and sound screen actor (White Shadows in the South Seas; Key Largo; Apache), born in Indianapolis, Indiana (d. 1963)
- Jan 13 George Gurdjieff, Armenian-Greek mystic (d. 1949)
- Jan 16 John Hamilton, American actor (The Adventures of Superman - "Perry White"), born in Shippensburg, Pennsylvania (d. 1958)
- Jan 17 Ola Raknes, Norwegian psychoanalyst and philologist (d. 1975)
- Jan 19 Alexander Woollcott, American critic and short story writer (The Man Who Came to Dinner), born in Phalanx, New Jersey (d. 1943)
- Jan 21 Alfred Henry Ackley, American composer, born in Spring Hill, Pennsylvania (d. 1960)
Georges Vezina (1887-1926)
Jan 21 Canadian ice hockey goalie (Vezina Trophy), born in Chicoutimi, Quebec
- Jan 22 Helen Hoyt, American poet (d. 1972)
- Jan 25 Diego Valeri, Italian author & poet (Le Gaie Tristezze), born in Piove di Sacco, Italy (d. 1976)
- Jan 26 Arnout Colnot, Dutch painter and graphic artist, born in Amsterdam (d. 1983)
- Jan 26 Enrique Ecker, Curacao-American bacteriologist (Rees-Ecker method for platelet counting), born in Willemstad, Curaçao (d. 1966)
François Faber (1887-1915)
Jan 26 Luxembourgian cyclist (Tour de France 1909), born in Aulnay-sur-lton, France
- Jan 26 Marc Mitscher, American naval commander (WWII - Task Force 58 in the Pacific), born in Hillsboro, Wisconsin (d. 1947)
- Jan 27 Carl Blegen, American archaeologist (excavator at Troy, Pylos), born in Minneapolis, Minnesota (d. 1971)
- Jan 28 Artur Rubinstein, Polish-American concert pianist, born in Łódź, Russian Empire (now Poland), (d. 1982)
- Jan 28 Lily (Theresa) Strickland, American composer of art songs, piano, and silent film music, and ethnomusicologist (The Music Courier), born in Anderson, South Carolina (d. 1958)
- Jan 29 Albert Conti, Austrian actor (Jazz Heaven, Doomed Battalion), born in Trieste, Austria-Hungary (d. 1967)