| Sg. Indef. | frjalsleikr |
| Sg. Def. | frjalsleikrinn |
| Pl. Indef. | frjalsleikar |
| Pl. Def. | frjalsleikarnir |
| Sg. Indef. | frjalsleiks |
| Sg. Def. | frjalsleiksins |
| Pl. Indef. | frjalsleika |
| Pl. Def. | frjalsleikanna |
| Sg. Indef. | frjalsleiki |
| Sg. Def. | frjalsleikinum |
| Pl. Indef. | frjalsleikum |
| Pl. Def. | frjalsleikunum |
| Sg. Indef. | frjalsleik |
| Sg. Def. | frjalsleikinn |
| Pl. Indef. | frjalsleika |
| Pl. Def. | frjalsleikana |