| Singular | Plural | |
|---|---|---|
| Nominativ | sponsus, sponsus | sponsique, sponsus, sponsi |
| Genitiv | sponsique, sponsus, sponsi | sponsorum |
| Dativ | sponso, sponsoque, sponsoreis | sponsis |
| Akkusativ | sponsum, sponsom, sponsum | sponsus, sponsos |
| Ablativ | sponsu, sponso, sponsusve, sponsoque, sponsoreis | sponsis |
| Vokativ | sponsus, sponse | sponsique, sponsus, sponsi |