| Sg. Indef. | köstur |
| Sg. Def. | kösturinn |
| Pl. Indef. | kestir |
| Pl. Def. | kestirnir |
| Sg. Indef. | kastar |
| Sg. Def. | kastarins |
| Pl. Indef. | kasta |
| Pl. Def. | kastanna |
| Sg. Indef. | kesti |
| Sg. Def. | kestinum |
| Pl. Indef. | köstum |
| Pl. Def. | köstunum |
| Sg. Indef. | köst |
| Sg. Def. | köstinn |
| Pl. Indef. | kesti |
| Pl. Def. | kestina |