| Singular | Plural | |
|---|---|---|
| Nominativ | diaconissa | diaconissae |
| Genitiv | diaconissae, diaconissai | diaconissum, diaconissarum |
| Dativ | diaconissae, diaconissai | diaconissis, diaconissabus |
| Akkusativ | diaconissam | diaconissas |
| Ablativ | diaconissa, diaconissad | diaconissis, diaconissabus |
| Vokativ | diaconissa | diaconissae |