| Singular | Plural | |
|---|---|---|
| Nominativ | cataphractes | cataphractae |
| Genitiv | cataphractai, cataphractae | cataphractum, cataphractarum |
| Dativ | cataphractae, cataphractai | cataphractabus, cataphractis |
| Akkusativ | cataphractam, cataphracten | cataphractas |
| Ablativ | cataphracte, cataphracta | cataphractabus, cataphractis |
| Vokativ | cataphracte, cataphracta | cataphractae |