There are 4 mathematicians whose last name begin with HALLD.
| Halldin, Roger | Lund University | 2005 |
| Halldorsson, Bjarni | Carnegie Mellon University | 2001 |
| Halldorsson, Magnus | Rutgers University, New Brunswick | 1991 |
| Halldorsson, Hoeskuldur | Massachusetts Institute of Technology | 2013 |