| Sg | Pl | |
| Nom | hafr | hafrar (rule) |
| Acc | hafr (rule) | hafra (rule) |
| Dat | hafri (rule) | höfrum (rule) |
| Gen | hafrs (rule) | hafra (rule) |
| Sg | Pl | |
| Nom | hafrinn (rule) | hafrarnir (rule) |
| Acc | hafrinn (rule) | hafrana (rule) |
| Dat | hafrinum (rule) | höfrunum (rule) |
| Gen | hafrsins (rule) | hafranna (rule) |