| Singular | Plural | |
|---|---|---|
| Nominativ | diadema | diademata, diademae |
| Genitiv | diadematis, diademae, diademai | diademarum, diadematium, diadematum, diademum |
| Dativ | diademati, diademate, diademae, diademai | diademabus, diadematibus, diademis |
| Akkusativ | diadema, diademam | diademata, diademas |
| Ablativ | diademate, diadema, diademad | diademabus, diadematibus, diademis |
| Vokativ | diadema | diademata, diademae |
12 (32) Formen für „diadema“