| Sg | Pl | |
| Nom | hersir | hersar (rule) |
| Acc | hersi (rule) | hersa (rule) |
| Dat | hersi (rule) | hersum (rule) |
| Gen | hersis (rule) | hersa (rule) |
| Sg | Pl | |
| Nom | hersirinn (rule) | hersarnir (rule) |
| Acc | hersinn (rule) | hersana (rule) |
| Dat | hersinum (rule) | hersunum (rule) |
| Gen | hersisins (rule) | hersanna (rule) |