| Singular | Plural | |
|---|---|---|
| Nominativ | regulus, regulus | reguli, reguli, regulique |
| Genitiv | reguli, reguli, regulique | regulorum, regulorum |
| Dativ | regulo, regulo | regulis, regulis |
| Akkusativ | regulom, regulum, regulom, regulum | regulos, regulos |
| Ablativ | regulo, regulo | regulis, regulis |
| Vokativ | regule, regule | reguli, reguli, regulique |