FromČech +-áček(diminutive suffix).
| singular | plural | |
|---|---|---|
| nominative | Čecháček | Čecháčkové |
| genitive | Čecháčka | Čecháčků |
| dative | Čecháčkovi,Čecháčku | Čecháčkům |
| accusative | Čecháčka | Čecháčky |
| vocative | Čecháčku | Čecháčkové |
| locative | Čecháčkovi,Čecháčku | Čecháčcích |
| instrumental | Čecháčkem | Čecháčky |