| Nominative | naivka |
| Genitive | naivky |
| Dative | naivkovi; naivce |
| Accusative | naivku |
| Vocative | naivko |
| Locative | naivkovi; naivce |
| Instrumental | naivkou |
| Nominative | naivkové; naivky |
| Genitive | naivků; naivek |
| Dative | naivkům; naivkám |
| Accusative | naivky |
| Vocative | naivkové; naivky |
| Locative | naivcích; naivkách |
| Instrumental | naivky; naivkami |