| Sg | Pl | |
| Nom | örn | arnar (rule) |
| Acc | örn (rule) | arna (rule) |
| Dat | arni (rule) | örnum (rule) |
| Gen | arnar (rule) | arna (rule) |
| Sg | Pl | |
| Nom | örninn (rule) | arnarnir (rule) |
| Acc | örninn (rule) | arnana (rule) |
| Dat | arninum (rule) | örnunum (rule) |
| Gen | arnarins (rule) | arnanna (rule) |