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