| 42091 | April 12 | Birth | 1929 – Elspet Gray, Scottish actress (d. 2013) |
| 42092 | April 12 | Birth | 1929 – Mukhran Machavariani, Georgian poet and educator (d. 2010) |
| 42093 | April 12 | Birth | 1930 – John Landy, Australian runner and politician, 26th Governor of Victoria |
| 42094 | April 12 | Birth | 1930 – Manuel Neri, American sculptor and painter |
| 42095 | April 12 | Birth | 1930 – Michał Życzkowski, Polish technician and educator (d. 2006) |
| 42096 | April 12 | Birth | 1930 – Bryan Magee, English philosopher and politician |
| 42097 | April 12 | Birth | 1931 – Leonid Derbenyov, Russian poet and songwriter (d. 1995) |
| 42098 | April 12 | Birth | 1932 – Lakshman Kadirgamar, Sri Lankan lawyer and politician, 5th Sri Lankan Minister of Foreign Affairs (d. 2005) |
| 42099 | April 12 | Birth | 1932 – Jean-Pierre Marielle, French actor |
| 42100 | April 12 | Birth | 1932 – Tiny Tim, American singer and ukulele player (d. 1996) |
| 42101 | April 12 | Birth | 1933 – Montserrat Caballé, Spanish soprano and actress |
| 42102 | April 12 | Birth | 1934 – Heinz Schneiter, Swiss footballer and manager |
| 42103 | April 12 | Birth | 1935 – Jimmy Makulis, Greek-German singer (d. 2007) |
| 42104 | April 12 | Birth | 1935 – Wendy Savage, English gynaecologist and activist |
| 42105 | April 12 | Birth | 1936 – Charles Napier, American actor and singer (d. 2011) |
| 42106 | April 12 | Birth | 1936 – Kennedy Simmonds, Kittitian politician, 4th Prime Minister of Saint Kitts and Nevis |
| 42107 | April 12 | Birth | 1937 – Dennis Banks, American author and activist |
| 42108 | April 12 | Birth | 1937 – Igor Volk, Ukrainian-Russian colonel, pilot, and astronaut |
| 42109 | April 12 | Birth | 1939 – Alan Ayckbourn, English director and playwright |
| 42110 | April 12 | Birth | 1939 – Johnny Raper, Australian rugby player and coach |
| 42111 | April 12 | Birth | 1940 – Bashir Ahmad, Indian-Bangladeshi singer (d. 2014) |
| 42112 | April 12 | Birth | 1940 – Woodie Fryman, American baseball player (d. 2011) |
| 42113 | April 12 | Birth | 1940 – John Hagee, American pastor and theologian |
| 42114 | April 12 | Birth | 1940 – Herbie Hancock, American pianist, composer, and bandleader (Miles Davis Quintet) |
| 42115 | April 12 | Birth | 1941 – Bobby Moore, English footballer and manager (d. 1993) |
| 42116 | April 12 | Birth | 1942 – Frank Bank, American actor (d. 2013) |
| 42117 | April 12 | Birth | 1942 – Bill Bryden, Scottish actor, director, and screenwriter |
| 42118 | April 12 | Birth | 1942 – Carlos Reutemann, Argentinian race car driver and politician, Governor of Santa Fe |
| 42119 | April 12 | Birth | 1942 – Jacob Zuma, South African politician, 4th President of South Africa |
| 42120 | April 12 | Birth | 1943 – Sumitra Mahajan, Indian politician, 16th Speaker of the Lok Sabha |