| 39541 | April 6 | Birth | 1903 – Mickey Cochrane, American baseball player and manager (d. 1962) |
| 39542 | April 6 | Birth | 1903 – Harold Eugene Edgerton, American engineer and academic (d. 1990) |
| 39543 | April 6 | Birth | 1904 – Kurt Georg Kiesinger, German lawyer and politician, 3rd Chancellor of Germany (d. 1988) |
| 39544 | April 6 | Birth | 1908 – Marcel-Marie Desmarais, Canadian preacher, missionary, and author (d. 1994) |
| 39545 | April 6 | Birth | 1909 – William M. Branham, American minister and theologian (d. 1965) |
| 39546 | April 6 | Birth | 1909 – Hermann Lang, German race car driver (d. 1987) |
| 39547 | April 6 | Birth | 1911 – Feodor Felix Konrad Lynen, German biochemist and academic, Nobel Prize laureate (d. 1979) |
| 39548 | April 6 | Birth | 1913 – Shannon Boyd-Bailey McCune, American geographer and academic (d. 1993) |
| 39549 | April 6 | Birth | 1915 – Tadeusz Kantor, Polish director, painter, and set designer (d. 1990) |
| 39550 | April 6 | Birth | 1916 – Phil Leeds, American actor (d. 1998) |
| 39551 | April 6 | Birth | 1916 – Vincent Ellis McKelvey, American geologist and author (d. 1987) |
| 39552 | April 6 | Birth | 1917 – Leonora Carrington, English-Mexican painter and author (d. 2011) |
| 39553 | April 6 | Birth | 1918 – Alfredo Ovando Candía, Bolivian general and politician, 56th President of Bolivia (d. 1982) |
| 39554 | April 6 | Birth | 1918 – Big Walter Horton, American harmonica player (d. 1981) |
| 39555 | April 6 | Birth | 1919 – Georgios Mylonas, Greek politician, 11th Greek Minister of Culture (d. 1998) |
| 39556 | April 6 | Birth | 1920 – Jack Cover, American pilot and physicist, invented the Taser gun (d. 2009) |
| 39557 | April 6 | Birth | 1920 – Edmond H. Fischer, Chinese-American biochemist and academic, Nobel Prize laureate |
| 39558 | April 6 | Birth | 1921 – Wilbur Thompson, American shot putter (d. 2013) |
| 39559 | April 6 | Birth | 1923 – Than Tun, Burmese historian (d. 2005) |
| 39560 | April 6 | Birth | 1926 – Sergio Franchi, Italian-American singer and actor (d. 1990) |
| 39561 | April 6 | Birth | 1926 – Gil Kane, Latvian-American author and illustrator (d. 2000) |
| 39562 | April 6 | Birth | 1926 – Ian Paisley, Northern Irish evangelical minister and politician, 2nd First Minister of Northern Ireland (d. 2014) |
| 39563 | April 6 | Birth | 1926 – Randy Weston, American jazz pianist and composer |
| 39564 | April 6 | Birth | 1927 – Gerry Mulligan, American saxophonist, clarinet player, and composer (d. 1996) |
| 39565 | April 6 | Birth | 1928 – James Watson, American biologist, geneticist, and zoologist, Nobel Prize laureate |
| 39566 | April 6 | Birth | 1929 – Willis Hall, English playwright and author (d. 2005) |
| 39567 | April 6 | Birth | 1929 – Joi Lansing, American model, actress, and singer (d. 1972) |
| 39568 | April 6 | Birth | 1929 – André Previn, German-American pianist, composer, and conductor |
| 39569 | April 6 | Birth | 1931 – Ram Dass, American author and educator |
| 39570 | April 6 | Birth | 1931 – Ivan Dixon, American actor, director, and producer (d. 2008) |