| Sg | Pl | |
| Nom | háls | hálsar (rule) |
| Acc | háls (rule) | hálsa (rule) |
| Dat | hálsi (rule) | hálsum (rule) |
| Gen | hálss (rule) | hálsa (rule) |
| Sg | Pl | |
| Nom | hálsinn (rule) | hálsarnir (rule) |
| Acc | hálsinn (rule) | hálsana (rule) |
| Dat | hálsinum (rule) | hálsunum (rule) |
| Gen | hálssins (rule) | hálsanna (rule) |