| Oliwia | | aw-LEEV-yah | Polish | |
| Oliwier | | aw-LEEV-yer | Polish | |
| Oskar | | AWS-kahr (German, Polish) | Swedish, Norwegian, Danish, German, Polish | |
| Otylia | | - | Polish | |
| Patka | | - | Polish, Slovak | |
| Patrycja | | paht-RITS-yah | Polish | |
| Patryk | | PAHT-rik | Polish | |
| Paula | | POW-lah (German, Finnish, Spanish, Polish, Croatian), PAWL-ə (English), POW-lə (Portuguese), PAW-oo-law (Hungarian) | German, English, Finnish, Spanish, Portuguese, Catalan, Romanian, Hungarian, Polish, Dutch, Swedish, | |
| Paulina | | pow-LEE-nah (Spanish, Polish), paw-LEEN-ə (English) | Spanish, Portuguese, Polish, Swedish, Lithuanian, English, Ancient Roman | |
| PaweŁ | | PAH-vew | Polish | |
| Pelagia | | pe-LAHG-yah (Polish) | Ancient Greek, Greek, Polish | |
| Petronela | | - | Romanian, Slovak, Polish | |
| Pia | | PEE-ah (Italian, Danish, German) | Italian, Swedish, Norwegian, Danish, German, Polish, Slovene, Late Roman | |
| Piotr | | PYAWTR | Polish | |
| Pola | | - | Polish | |