| Sg | Pl | |
| Nom | seyra | seyrur (rule) |
| Acc | seyru (rule) | seyrur (rule) |
| Dat | seyru (rule) | seyrum (rule) |
| Gen | seyru (rule) | seyrna (rule) |
| Sg | Pl | |
| Nom | seyran (rule) | seyrurnar (rule) |
| Acc | seyruna (rule) | seyrurnar (rule) |
| Dat | seyrunni (rule) | seyrunum (rule) |
| Gen | seyrunnar (rule) | seyrnanna (rule) |