| Nominativ | aeter, aether, ether | aetheres |
| Genitiv | aeteris, aeterum, aetheris, aetherum | — |
| Dativ | aethere, etheri, aetere, aetheri | aetheribus |
| Akkusativ | aetherem, aethera, aetheraque, aetheras | — |
| Ablativ | aethere, aetere | aetheribus |
| Vokativ | ether, aeter, aether | aetheres |
