| Singular | Plural | |
|---|---|---|
| Nominativ | mercedula | mercedulae |
| Genitiv | mercedulai, mercedulae | mercedularum, mercedulum |
| Dativ | mercedulae, mercedulai | mercedulis, mercedulabus |
| Akkusativ | mercedulam | mercedulas |
| Ablativ | mercedula, mercedulad | mercedulis, mercedulabus |
| Vokativ | mercedula | mercedulae |