| Sg. Indef. | byr |
| Sg. Def. | byrinn |
| Pl. Indef. | byrir |
| Pl. Def. | byrirnir |
| Sg. Indef. | byrjar; byrs |
| Sg. Def. | byrjarins; byrsins |
| Pl. Indef. | byrja |
| Pl. Def. | byrjanna |
| Sg. Indef. | byr |
| Sg. Def. | byrnum |
| Pl. Indef. | byrjum |
| Pl. Def. | byrjunum |
| Sg. Indef. | byr |
| Sg. Def. | byrinn |
| Pl. Indef. | byri |
| Pl. Def. | byrina |