| Nominative | prapredok |
| Genitive | prapredka |
| Dative | prapredkovi |
| Accusative | prapredka |
| Locative | prapredkovi |
| Instrumental | prapredkom |
| Nominative | prapredkovia |
| Genitive | prapredkov |
| Dative | prapredkom |
| Accusative | prapredkov |
| Locative | prapredkoch |
| Instrumental | prapredkami |