There are 3 mathematicians whose last name begin with HAHA.
| Hahanov, Vladimir | Kharkiv National University of Radioelectronics | 1996 |
| Hahanov, Vladimir | Kharkiv National University of Radioelectronics | 1985 |
| Hahanova, Irina | Kharkiv National University of Radioelectronics | 2008 |