| Singular | Plural | |
|---|---|---|
| Nominativ | perfuga, perfugas, perfugasque | perfugae |
| Genitiv | perfugai, perfugae | perfugum, perfugarum, perfugarumque |
| Dativ | perfugae, perfugai | perfugisque, perfugabus, perfugis |
| Akkusativ | perfugam | perfugas, perfugasque |
| Ablativ | perfuga, perfugad | perfugisque, perfugabus, perfugis |
| Vokativ | perfuga | perfugae |