| Singular | Plural | |
|---|---|---|
| Nominativ | catachanna | catachannae |
| Genitiv | catachannai, catachannae | catachannarum, catachannum |
| Dativ | catachannai, catachannae | catachannis, catachannabus |
| Akkusativ | catachannam | catachannas |
| Ablativ | catachanna, catachannad | catachannis, catachannabus |
| Vokativ | catachanna | catachannae |