| Singular | Plural | |
|---|---|---|
| Nominativ | regulaeque, regula, regula | regulae, regulae |
| Genitiv | regulae, regulai, regulae, regulai | regularum, regularum |
| Dativ | regulae, regulai, regulai, regulae | regulis, regulabus, regulabus, regulis |
| Akkusativ | regulam, regulam | regulas, regulas |
| Ablativ | regulaeque, regula, regulad, regulad, regula | regulis, regulabus, regulabus, regulis |
| Vokativ | regulaeque, regula, regula | regulae, regulae |