| 91141 | August 12 | Birth | 1856 – Diamond Jim Brady, American businessman and philanthropist (d. 1917) |
| 91142 | August 12 | Birth | 1857 – Ernestine von Kirchsberg, Austrian painter and educator (d. 1924) |
| 91143 | August 12 | Birth | 1859 – Katharine Lee Bates, American poet and author (d. 1929) |
| 91144 | August 12 | Birth | 1860 – Klara Hitler, Austrian mother of Adolf Hitler (d. 1907) |
| 91145 | August 12 | Birth | 1866 – Jacinto Benavente, Spanish playwright, Nobel Prize laureate (d. 1954) |
| 91146 | August 12 | Birth | 1866 – Henrik Sillem, Dutch target shooter, mountaineer, and jurist (d. 1907) |
| 91147 | August 12 | Birth | 1867 – Edith Hamilton, German-American author and educator (d. 1963) |
| 91148 | August 12 | Birth | 1871 – Gustavs Zemgals, Latvian politician, 2nd President of Latvia (d. 1939) |
| 91149 | August 12 | Birth | 1872 – Princess Marie Louise of Schleswig-Holstein (d. 1956) |
| 91150 | August 12 | Birth | 1876 – Mary Roberts Rinehart, American author and playwright (d. 1958) |
| 91151 | August 12 | Birth | 1877 – Albert Bartha, Hungarian general and politician, Hungarian Minister of Defence (d. 1960) |
| 91152 | August 12 | Birth | 1880 – Radclyffe Hall, English poet, author, and activist (d. 1943) |
| 91153 | August 12 | Birth | 1880 – Christy Mathewson, American baseball player and manager (d. 1925) |
| 91154 | August 12 | Birth | 1881 – Cecil B. DeMille, American director and producer (d. 1959) |
| 91155 | August 12 | Birth | 1883 – Pauline Frederick, American actress (d. 1938) |
| 91156 | August 12 | Birth | 1883 – Martha Hedman, Swedish-American actress and playwright (d. 1974) |
| 91157 | August 12 | Birth | 1883 – Marion Lorne, American actress (d. 1968) |
| 91158 | August 12 | Birth | 1885 – Jean Cabannes, French physicist and academic (d. 1959) |
| 91159 | August 12 | Birth | 1885 – Juhan Simm, Estonian composer and conductor (d. 1959) |
| 91160 | August 12 | Birth | 1886 – Keith Murdoch, Australian journalist (d. 1952) |
| 91161 | August 12 | Birth | 1887 – Erwin Schrödinger, Austrian physicist and academic, Nobel Prize laureate (d. 1961) |
| 91162 | August 12 | Birth | 1889 – Zerna Sharp, American author and educator (d. 1981) |
| 91163 | August 12 | Birth | 1891 – C. E. M. Joad, English philosopher and academic (d. 1953) |
| 91164 | August 12 | Birth | 1892 – Alfred Lunt, American actor and director (d. 1977) |
| 91165 | August 12 | Birth | 1896 – Ejner Federspiel, Danish actor (d. 1981) |
| 91166 | August 12 | Birth | 1897 – Maurice Fernandes, Guyanese cricketer (d. 1981) |
| 91167 | August 12 | Birth | 1899 – Ben Sealey, Trinidadian cricketer (d. 1963) |
| 91168 | August 12 | Birth | 1902 – Mohammad Hatta, Indonesian politician, 1st Vice President of Indonesia (d. 1980) |
| 91169 | August 12 | Birth | 1904 – Idel Jakobson, Latvian-Estonian NKVD officer (d. 1997) |
| 91170 | August 12 | Birth | 1904 – Tamás Lossonczy, Hungarian painter (d. 2009) |