| Sg. Indef. | hertoganafn |
| Sg. Def. | hertoganafnit |
| Pl. Indef. | hertoganǫfn |
| Pl. Def. | hertoganǫfnin |
| Sg. Indef. | hertoganafns |
| Sg. Def. | hertoganafnsins |
| Pl. Indef. | hertoganafna |
| Pl. Def. | hertoganafnanna |
| Sg. Indef. | hertoganafni |
| Sg. Def. | hertoganafninu |
| Pl. Indef. | hertoganǫfnum |
| Pl. Def. | hertoganǫfnunum |
| Sg. Indef. | hertoganafn |
| Sg. Def. | hertoganafnit |
| Pl. Indef. | hertoganǫfn |
| Pl. Def. | hertoganǫfnin |