| 12331 | January 31 | Birth | 1686 – Hans Egede, Norwegian missionary and explorer (d. 1758) |
| 12332 | January 31 | Birth | 1752 – Gouverneur Morris, American politician (d. 1816) |
| 12333 | January 31 | Birth | 1759 – François Devienne, French flute player and composer (d. 1803) |
| 12334 | January 31 | Birth | 1797 – Franz Schubert, Austrian pianist and composer (d. 1828) |
| 12335 | January 31 | Birth | 1820 – William B. Washburn, American politician, 28th Governor of Massachusetts (d. 1887) |
| 12336 | January 31 | Birth | 1825 – Miska Magyarics, Hungarian-Slovenian poet (d. 1883) |
| 12337 | January 31 | Birth | 1835 – Lunalilo of Hawaii (d. 1874) |
| 12338 | January 31 | Birth | 1854 – David Emmanuel, Romanian mathematician and academic (d. 1941) |
| 12339 | January 31 | Birth | 1857 – George Jackson Churchward, English engineer (d. 1933) |
| 12340 | January 31 | Birth | 1865 – Henri Desgrange, French cyclist and journalist (d. 1940) |
| 12341 | January 31 | Birth | 1865 – Shastriji Maharaj, Indian spiritual leader, founded BAPS (d. 1951) |
| 12342 | January 31 | Birth | 1868 – Theodore William Richards, American chemist and academic, Nobel Prize laureate (d. 1928) |
| 12343 | January 31 | Birth | 1872 – Zane Grey, American dentist and author (d. 1939) |
| 12344 | January 31 | Birth | 1881 – Irving Langmuir, American chemist and physicist, Nobel Prize laureate (d. 1957) |
| 12345 | January 31 | Birth | 1884 – Theodor Heuss, German journalist and politician, 1st President of the Federal Republic of Germany (d. 1963) |
| 12346 | January 31 | Birth | 1884 – Nathaniel Moore, American golfer (d. 1910) |
| 12347 | January 31 | Birth | 1884 – Mammad Amin Rasulzade, Azerbaijani scholar and politician, 1st President of The Democratic Republic of Azerbaijan (d. 1955) |
| 12348 | January 31 | Birth | 1889 – Frank Foster, English cricketer (d. 1958) |
| 12349 | January 31 | Birth | 1892 – Eddie Cantor, American singer-songwriter, actor, and dancer (d. 1964) |
| 12350 | January 31 | Birth | 1894 – Isham Jones, American saxophonist, composer, and bandleader (d. 1956) |
| 12351 | January 31 | Birth | 1896 – Sofya Yanovskaya, Russian mathematician and historian (d. 1966) |
| 12352 | January 31 | Birth | 1902 – Nat Bailey, Canadian businessman founded White Spot (d. 1978) |
| 12353 | January 31 | Birth | 1902 – Tallulah Bankhead, American actress (d. 1968) |
| 12354 | January 31 | Birth | 1902 – Alva Myrdal, Swedish sociologist and politician Nobel Prize laureate (d. 1986) |
| 12355 | January 31 | Birth | 1905 – Diana Napier, English actress (d. 1982) |
| 12356 | January 31 | Birth | 1905 – John O'Hara, American author, playwright, and screenwriter (d. 1970) |
| 12357 | January 31 | Birth | 1906 – Roosevelt Sykes, American singer and pianist (d. 1983) |
| 12358 | January 31 | Birth | 1909 – Miron Grindea, Romanian-English journalist (d. 1995) |
| 12359 | January 31 | Birth | 1911 – Eddie Byrne, Irish actor (d. 1981) |
| 12360 | January 31 | Birth | 1913 – Don Hutson, American football player and coach (d. 1997) |