| Singular | Plural | |
|---|---|---|
| Nominativ | thybris, tiberis, tiberisque | tiberes |
| Genitiv | thybris, tiberis, tiberisque | tiberium, tiberiumque, tiberum |
| Dativ | thybri, tiberiolus, tiberi, tiberiana, dibere, tiberianam, tibere, tiberiusque | tiberibus |
| Akkusativ | tiberem, tiberim | tiberes, thybris, tiberis, tiberisque, tibereis |
| Ablativ | thybri, tiberiolus, tiberi, tiberiana, dibere, tiberianam, tibere, tiberiusque | tiberibus |
| Vokativ | tiberis, tiberisque | tiberes |