| Sg. Indef. | fals |
| Sg. Def. | falsið |
| Pl. Indef. | föls |
| Pl. Def. | fölsin |
| Sg. Indef. | fals |
| Sg. Def. | falsins |
| Pl. Indef. | falsa |
| Pl. Def. | falsanna |
| Sg. Indef. | falsi |
| Sg. Def. | falsinu |
| Pl. Indef. | fölsum |
| Pl. Def. | fölsunum |
| Sg. Indef. | fals |
| Sg. Def. | falsið |
| Pl. Indef. | föls |
| Pl. Def. | fölsin |