| Sg. Indef. | hálsfesti |
| Sg. Def. | hálsfestin |
| Pl. Indef. | hálsfestar |
| Pl. Def. | hálsfestarnar |
| Sg. Indef. | hálsfestar |
| Sg. Def. | hálsfestarinnar |
| Pl. Indef. | hálsfesta |
| Pl. Def. | hálsfestanna |
| Sg. Indef. | hálsfesti |
| Sg. Def. | hálsfestinni |
| Pl. Indef. | hálsfestum |
| Pl. Def. | hálsfestunum |
| Sg. Indef. | hálsfesti |
| Sg. Def. | hálsfestina |
| Pl. Indef. | hálsfestar |
| Pl. Def. | hálsfestarnar |