Birthdays for 21st of May
| Name | Year | City | State/Country |
| Jeffrey Dahmer | 1960 | Milwaukee | Wisconsin |
| Serial killer, murdered 17 young men, he was killed while in prison | |
| Zodiac Sign: Gemini - Ascendant: Libra |
| |
| Ara Parseghian | 1923 | Akron | Ohio |
| Football coach | |
| Zodiac Sign: Taurus - Ascendant: Cancer |
| |
| Robert Good | 1922 | Crosby | Minnesota |
| Pediatrician, Immunologist | |
| Zodiac Sign: Taurus - Ascendant: Gemini |
| |
| Peter Hurkos | 1911 | Dordrecht | Netherlands |
| Psychic, developed ESP after a fall that kept him unconscious three days | |
| Zodiac Sign: Taurus - Ascendant: Gemini |
| |
| Robert Montgomery | 1904 | Beacon | New York |
| Actor, father of actress Elizabeth Montgomery, nominated for Oscars in "Night Must Fall", "Here Comes Mr. Jordan" | |
| Zodiac Sign: Taurus - Ascendant: Taurus |
| |
| Henri Rousseau | 1844 | Laval | France |
| French artist known for his primitive paintings, also wrote poetry and composed music, served twice in the army | |
| Zodiac Sign: Gemini - Ascendant: Aquarius |
| |
