| Sg. Indef. | aldur |
| Sg. Def. | aldurinn |
| Pl. Indef. | aldrar |
| Pl. Def. | aldrarnir |
| Sg. Indef. | aldurs |
| Sg. Def. | aldursins |
| Pl. Indef. | aldra |
| Pl. Def. | aldranna |
| Sg. Indef. | aldri |
| Sg. Def. | aldrinum |
| Pl. Indef. | öldrum |
| Pl. Def. | öldrunum |
| Sg. Indef. | aldur |
| Sg. Def. | aldurinn |
| Pl. Indef. | aldra |
| Pl. Def. | aldrana |