| Singular | Plural | |
|---|---|---|
| Nominativ | croysidia | croysidiae |
| Genitiv | croysidiae, croysidiai | croysidiarum, croysidium |
| Dativ | croysidiae, croysidiai | croysidiis, croysidiabus |
| Akkusativ | croysidiam | croysidias |
| Ablativ | croysidiad, croysidia | croysidiis, croysidiabus |
| Vokativ | croysidia | croysidiae |