| Olivie | | o-lee-VEE (French) | French, Czech | |
| OndŘEj | | - | Czech | |
| Otakar | | - | Czech | |
| Othmar | | - | German, Czech, Ancient Germanic | |
| Otokar | | - | Czech | |
| PŘEmek | | - | Czech | |
| PŘEmysl | | - | Czech | |
| Patricie | | - | Czech | |
| Patrik | | - | Swedish, Czech, Slovak, Croatian, Hungarian | |
| Pavel | | PAH-vyel (Russian), PAH-veel (Russian) | Russian, Czech, Bulgarian, Slovene, Macedonian | |
| Pavla | | - | Czech, Slovene | |
| Pavlina | | - | Czech, Slovene, Macedonian | |
| Petr | | - | Czech | |
| Petra | | PET-rah (Finnish), PET-rə (English) | German, Dutch, Czech, Slovak, Slovene, Croatian, Hungarian, Swedish, Finnish, English | |
| RŮŽEna | | - | Czech | |