| Singular | Plural | |
|---|---|---|
| Nominativ | triennis, trienne | triennia, triennes |
| Genitiv | triennis | triennium, triennum |
| Dativ | trienni | triennibus |
| Akkusativ | trienne, triennem | triennia, triennis, triennes |
| Ablativ | trienni, trienne | triennibus |
| Vokativ | triennis, trienne | triennia, triennes |
| Singular | Plural | |
|---|---|---|
| Nominativ | triennius | — |
| Genitiv | — | — |
| Dativ | — | — |
| Akkusativ | triennius | — |
| Ablativ | — | — |
| Vokativ | triennius | — |
| Singular | Plural | |
|---|---|---|
| Nominativ | — | — |
| Genitiv | — | — |
| Dativ | — | — |
| Akkusativ | — | — |
| Ablativ | — | — |
| Vokativ | — | — |