| Nominativ | cataphractarium, cataphractaria, cataphractarius | cataphractarii, cataphractariae, cataphractaria |
| Genitiv | cataphractarii, cataphractarii, cataphractariae | cataphractariorum, cataphractariorum, cataphractariarum |
| Dativ | cataphractariae, cataphractario, cataphractario | cataphractariis |
| Akkusativ | cataphractariam, cataphractarium, cataphractarium | cataphractaria, cataphractarios, cataphractarias |
| Ablativ | cataphractario, cataphractaria, cataphractario | cataphractariis |
| Vokativ | cataphractarium, cataphractarie, cataphractaria | cataphractaria, cataphractarii, cataphractariae |
