| Singular | Plural | |
|---|---|---|
| Nominativ | bigna, bigna | bignae, bignae |
| Genitiv | bignai, bignai, bignae, bignae | bignarum, bignarum, bignum, bignum |
| Dativ | bignae, bignai, bignai, bignae | bignis, bignabus, bignis, bignabus |
| Akkusativ | bignam, bignam | bignas, bignas |
| Ablativ | bigna, bignad, bigna, bignad | bignis, bignabus, bignis, bignabus |
| Vokativ | bigna, bigna | bignae, bignae |