| Sg | Pl | |
| Nom | austr | aust (rule) |
| Acc | aust (rule) | aust (rule) |
| Dat | austi (rule) | austum (rule) |
| Gen | austs (rule) | austa (rule) |
| Sg | Pl | |
| Nom | austrit (rule) | austin (rule) |
| Acc | austit (rule) | austin (rule) |
| Dat | austinu (rule) | austunum (rule) |
| Gen | austsins (rule) | austanna (rule) |