| Sg | Pl | |
| Nom | sonr | synir (rule) |
| Acc | son (rule) | sonu (rule) |
| Dat | syni (rule) | sonum (rule) |
| Gen | sonar (rule) | sona (rule) |
| Sg | Pl | |
| Nom | sonrinn (rule) | synirnir (rule) |
| Acc | soninn (rule) | sonuna (rule) |
| Dat | syninum (rule) | sonunum (rule) |
| Gen | sonarins (rule) | sonanna (rule) |