Deklinationen
| Singular | Plural | |
|---|---|---|
| Nominativ | singular sg fatuus | plural pl fatuī |
| Genitiv | singular sg fatuī | plural pl fatuōrum |
| Dativ | singular sg fatuō | plural pl fatuīs |
| Akkusativ | singular sg fatuum | plural pl fatuōs |
| Ablativ | singular sg fatuō | plural pl fatuīs |
| Vokativ | singular sg fatue | plural pl fatuī |