| Sg. Indef. | býur |
| Sg. Def. | býurin |
| Pl. Indef. | býir |
| Pl. Def. | býirnir |
| Sg. Indef. | býar |
| Sg. Def. | býarins |
| Pl. Indef. | býa |
| Pl. Def. | býanna |
| Sg. Indef. | bý; býi |
| Sg. Def. | býnum; býinum |
| Pl. Indef. | býum |
| Pl. Def. | býunum |
| Sg. Indef. | bý |
| Sg. Def. | býin |
| Pl. Indef. | býir |
| Pl. Def. | býirnar |