| 137881 | December 6 | Birth | 1875 – Evelyn Underhill, English mystic and author (d. 1941) |
| 137882 | December 6 | Birth | 1876 – Fred Duesenberg, German-American businessman, co-founded the Duesenberg Automobile & Motors Company (d. 1932) |
| 137883 | December 6 | Birth | 1884 – Cornelia Meigs, American author, playwright, and academic (d. 1973) |
| 137884 | December 6 | Birth | 1886 – Joyce Kilmer, American soldier, author, and poet (d. 1918) |
| 137885 | December 6 | Birth | 1887 – Lynn Fontanne, English actress (d. 1983) |
| 137886 | December 6 | Birth | 1887 – Joseph Lamb, American pianist and composer (d. 1960) |
| 137887 | December 6 | Birth | 1888 – Will Hay, English actor, director, and screenwriter (d. 1949) |
| 137888 | December 6 | Birth | 1890 – Dion Fortune, Welsh occultist, psychologist, and author (d. 1946) |
| 137889 | December 6 | Birth | 1890 – Yoshio Nishina, Japanese physicist and academic (d. 1951) |
| 137890 | December 6 | Birth | 1890 – Rudolf Schlichter, German painter (d. 1955) |
| 137891 | December 6 | Birth | 1892 – Osbert Sitwell, English-Italian captain, poet, and author (d. 1969) |
| 137892 | December 6 | Birth | 1893 – Homer N. Wallin, American admiral (d. 1984) |
| 137893 | December 6 | Birth | 1896 – Ira Gershwin, American songwriter (d. 1983) |
| 137894 | December 6 | Birth | 1898 – Alfred Eisenstaedt, German-American photographer and journalist (d. 1995) |
| 137895 | December 6 | Birth | 1898 – Gunnar Myrdal, Swedish sociologist and economist, Nobel Prize laureate (d. 1987) |
| 137896 | December 6 | Birth | 1900 – Agnes Moorehead, American actress and singer (d. 1974) |
| 137897 | December 6 | Birth | 1901 – Eliot Porter, American photographer (d. 1990) |
| 137898 | December 6 | Birth | 1903 – Tony Lazzeri, American baseball player and manager (d. 1946) |
| 137899 | December 6 | Birth | 1904 – Ève Curie, French-American journalist and pianist (d. 2007) |
| 137900 | December 6 | Birth | 1905 – Elizabeth Yates, American author (d. 2001) |
| 137901 | December 6 | Birth | 1908 – Pierre Graber, Swiss lawyer and politician, 69th President of the Swiss Confederation (d. 2003) |
| 137902 | December 6 | Birth | 1908 – Baby Face Nelson, American gangster (d. 1934) |
| 137903 | December 6 | Birth | 1908 – Miklós Szabó, Hungarian runner (d. 2000) |
| 137904 | December 6 | Birth | 1909 – Rulon Jeffs, American religious leader (d. 2002) |
| 137905 | December 6 | Birth | 1910 – David M. Potter, American historian, author, and academic (d. 1971) |
| 137906 | December 6 | Birth | 1913 – Karl Haas, German-American pianist, conductor, and radio host (d. 2005) |
| 137907 | December 6 | Birth | 1913 – Eleanor Holm, American swimmer and actress (d. 2004) |
| 137908 | December 6 | Birth | 1913 – John Mikaelsson, Swedish race walker (d. 1987) |
| 137909 | December 6 | Birth | 1916 – Yekaterina Budanova, Russian captain and pilot (d. 1943) |
| 137910 | December 6 | Birth | 1916 – Kristján Eldjárn, Icelandic educator and politician, 3rd President of Iceland (d. 1982) |