| Sg. Indef. | sjór |
| Sg. Def. | sjórinn |
| Pl. Indef. | sjóir |
| Pl. Def. | sjóirnir |
| Sg. Indef. | sjávar; sjós |
| Sg. Def. | sjávarins; sjósins |
| Pl. Indef. | sjóa |
| Pl. Def. | sjóanna |
| Sg. Indef. | sjó |
| Sg. Def. | sjónum |
| Pl. Indef. | sjóum |
| Pl. Def. | sjóunum |
| Sg. Indef. | sjó |
| Sg. Def. | sjóinn |
| Pl. Indef. | sjói |
| Pl. Def. | sjóina |