| Sg | Pl | |
| Nom | þurs | þursar (rule) |
| Acc | þurs (rule) | þursa (rule) |
| Dat | þursi (rule) | þursum (rule) |
| Gen | þurss (rule) | þursa (rule) |
| Sg | Pl | |
| Nom | þursinn (rule) | þursarnir (rule) |
| Acc | þursinn (rule) | þursana (rule) |
| Dat | þursinum (rule) | þursunum (rule) |
| Gen | þurssins (rule) | þursanna (rule) |