| Sg. Indef. | sigdalur |
| Sg. Def. | sigdalurinn |
| Pl. Indef. | sigdalir |
| Pl. Def. | sigdalirnir |
| Sg. Indef. | sigdals |
| Sg. Def. | sigdalsins |
| Pl. Indef. | sigdala |
| Pl. Def. | sigdalanna |
| Sg. Indef. | sigdal |
| Sg. Def. | sigdalnum |
| Pl. Indef. | sigdölum |
| Pl. Def. | sigdölunum |
| Sg. Indef. | sigdal |
| Sg. Def. | sigdalinn |
| Pl. Indef. | sigdali |
| Pl. Def. | sigdalina |