| Sg. Indef. | jafnaldri |
| Sg. Def. | jafnaldrinn |
| Pl. Indef. | jafnaldrar |
| Pl. Def. | jafnaldrarnir |
| Sg. Indef. | jafnaldra |
| Sg. Def. | jafnaldrans |
| Pl. Indef. | jafnaldra |
| Pl. Def. | jafnaldranna |
| Sg. Indef. | jafnaldra |
| Sg. Def. | jafnaldranum |
| Pl. Indef. | jafnöldrum |
| Pl. Def. | jafnöldrunum |
| Sg. Indef. | jafnaldra |
| Sg. Def. | jafnaldrann |
| Pl. Indef. | jafnaldra |
| Pl. Def. | jafnaldrana |