| Nominativ | serpentigenas, serpentigena, serpentigenas, serpentigena | serpentigenae, serpentigenae |
| Genitiv | serpentigenae, serpentigenai, serpentigenai, serpentigenae | serpentigenarum, serpentigenarum, serpentigenum, serpentigenum |
| Dativ | serpentigenai, serpentigenae, serpentigenai, serpentigenae | serpentigenis, serpentigenabus, serpentigenis, serpentigenabus |
| Akkusativ | serpentigenam, serpentigenam | serpentigenas, serpentigenas |
| Ablativ | serpentigenad, serpentigena, serpentigenad, serpentigena | serpentigenis, serpentigenabus, serpentigenis, serpentigenabus |
| Vokativ | serpentigena, serpentigena | serpentigenae, serpentigenae |
