| Sg | Pl | |
| Nom | sigr | sigrar (rule) |
| Acc | sigr (rule) | sigra (rule) |
| Dat | sigri (rule) | sigrum (rule) |
| Gen | sigrs (rule) | sigra (rule) |
| Sg | Pl | |
| Nom | sigrinn (rule) | sigrarnir (rule) |
| Acc | sigrinn (rule) | sigrana (rule) |
| Dat | sigrinum (rule) | sigrunum (rule) |
| Gen | sigrsins (rule) | sigranna (rule) |