- Jan 1 Gustave Whitehead, German inventor (d. 1927)
- Jan 1 Frank Knox, American Secretary of the Navy (d. 1944)
- Jan 4 Svend Fleuron, Danish writer, born on Good Katrinedal (d. 1966)
Joseph Erlanger
Jan 5 Joseph Erlanger, American physiologist (shock therapy-Nobel 1944), born in San Francisco, California (d. 1965)
Joseph Erlanger
- Jan 13 Jozef E van Roey, Flemish cardinal/archbishop of Mechlin
- Jan 14 Thornton W. Burgess, American conservationist & author (The Bedtime Story-Books; Now I Remember: Autobiography of an Amateur Naturalist), born in Sandwich, Massachusetts (d. 1965)
- Jan 16 Robert W. Service, English-Canadian poet (Cremation of Sam McGee), born in Lancashire, England (d. 1958)
- Jan 22 Wincenty Witoz, Galicia, Prime Minister of Poland (1920-21, 1923, 1926)
- Jan 22 Edward Harkness, American philanthropist (d. 1940)
- Jan 24 Arthur Schomburg (Arturo Alfonso), Puerto Rico, archivist of African American history and culture
- Jan 25 Hewlett Johnson [Red Dean of Canterbury], English bishop, born in Salford, Greater Manchester (d. 1966)
- Jan 25 W. Somerset Maugham, British novelist & poet (Of Human Bondage), born in Paris, France (d. 1965)
John D. Rockefeller Jr
Jan 29 John D. Rockefeller Jr, American financier and philanthropist, born in Cleveland, Ohio
John D. Rockefeller Jr