| Sg | Pl | |
| Nom | son | sonar (rule) |
| Acc | son (rule) | sona (rule) |
| Dat | soni (rule) | sonum (rule) |
| Gen | sonar (rule) | sona (rule) |
| Sg | Pl | |
| Nom | soninn (rule) | sonarnir (rule) |
| Acc | soninn (rule) | sonana (rule) |
| Dat | soninum (rule) | sonunum (rule) |
| Gen | sonarins (rule) | sonanna (rule) |