| Sg. Indef. | þumall |
| Sg. Def. | þumallinn |
| Pl. Indef. | þumlar |
| Pl. Def. | þumlarnir |
| Sg. Indef. | þumals |
| Sg. Def. | þumalsins |
| Pl. Indef. | þumla |
| Pl. Def. | þumlanna |
| Sg. Indef. | þumli |
| Sg. Def. | þumlinum |
| Pl. Indef. | þumlum |
| Pl. Def. | þumlunum |
| Sg. Indef. | þumal |
| Sg. Def. | þumalinn |
| Pl. Indef. | þumla |
| Pl. Def. | þumlana |