| 8611 | January 20 | Birth | 1804 – Eugène Sue, French author (d. 1857) |
| 8612 | January 20 | Birth | 1812 – Thomas Meik, Scottish engineer (d. 1896) |
| 8613 | January 20 | Birth | 1834 – George D. Robinson, American lawyer and politician, 34th Governor of Massachusetts (d. 1896) |
| 8614 | January 20 | Birth | 1855 – Ernest Chausson, French composer (d. 1899) |
| 8615 | January 20 | Birth | 1867 – Yvette Guilbert, French singer and actress (d. 1944) |
| 8616 | January 20 | Birth | 1870 – Guillaume Lekeu, Belgian composer (d. 1894) |
| 8617 | January 20 | Birth | 1873 – Johannes V. Jensen, Danish author, poet, and playwright, Nobel Prize laureate (d. 1950) |
| 8618 | January 20 | Birth | 1876 – Josef Hofmann, Polish-American pianist and composer (d. 1967) |
| 8619 | January 20 | Birth | 1878 – Finlay Currie, Scottish-English actor (d. 1968) |
| 8620 | January 20 | Birth | 1878 – Ruth St. Denis, American dancer (d. 1968) |
| 8621 | January 20 | Birth | 1880 – Max Schöne, German swimmer (d. 1961) |
| 8622 | January 20 | Birth | 1882 – Johnny Torrio, Italian-American mobster (d. 1957) |
| 8623 | January 20 | Birth | 1883 – Enoch L. Johnson, American mob boss (d. 1968) |
| 8624 | January 20 | Birth | 1886 – Claude Jameson, American soccer player (d. 1943) |
| 8625 | January 20 | Birth | 1889 – Allan Haines Loughead, American engineer and businessman founded the Alco Hydro-Aeroplane Company (d. 1969) |
| 8626 | January 20 | Birth | 1889 – G. H. Luce, British colonial scholar in Burma (d. 1979) |
| 8627 | January 20 | Birth | 1891 – Mischa Elman, Ukrainian-American violinist (d. 1967) |
| 8628 | January 20 | Birth | 1893 – Georg Åberg, Swedish triple jumper (d. 1946) |
| 8629 | January 20 | Birth | 1894 – Harold Gray, American cartoonist created Little Orphan Annie (d. 1968) |
| 8630 | January 20 | Birth | 1894 – Walter Piston, American composer, theorist, and academic (d. 1976) |
| 8631 | January 20 | Birth | 1895 – Gábor Szegő, Hungarian mathematician and academic (d. 1985) |
| 8632 | January 20 | Birth | 1896 – George Burns, American actor, singer, and producer (d. 1996) |
| 8633 | January 20 | Birth | 1898 – U Razak, Burmese educator, politician & martyr (d. 1947) |
| 8634 | January 20 | Birth | 1899 – Clarice Cliff, English potter (d. 1972) |
| 8635 | January 20 | Birth | 1899 – Kenjiro Takayanagi, Japanese engineer (d. 1990) |
| 8636 | January 20 | Birth | 1900 – Colin Clive, French-English actor (d. 1937) |
| 8637 | January 20 | Birth | 1902 – Leon Ames, American actor and singer (d. 1993) |
| 8638 | January 20 | Birth | 1902 – Kevin Barry, Irish republican rebel (d. 1920) |
| 8639 | January 20 | Birth | 1906 – Aristotle Onassis, Turkish-Greek businessman (d. 1975) |
| 8640 | January 20 | Birth | 1907 – Paula Wessely, Austrian actress and producer (d. 2000) |