There are 5 mathematicians whose last name begin with HAJN.
| Hajnal, Andras | University of Szeged | 1956 |
| Hajnal, John | ||
| Hajnal, Joseph | University of Bristol | 1985 |
| Hajnal, Péter | The University of Chicago | 1988 |
| Hajnosz, Andrzej | Uniwersytet Marii Curie-Skłodowskiej | 1987 |