| Pitter | | PIT-tər (Limburgish) | Frisian, Limburgish | |
| Pius | | PIE-əs (English) | Late Roman | |
| PlÁCido | | PLAH-thee-dho (Spanish), PLAH-see-dho (Latin American Spanish) | Spanish, Portuguese | |
| Placida | | - | Late Roman, Italian | |
| Placido | | - | Italian | |
| Placidus | | - | Late Roman | |
| Plamen | | - | Bulgarian, Serbian | |
| Plato | | PLAY-to (English) | Ancient Greek (Latinized) | |
| Platon | | - | Ancient Greek, Greek, Russian | |
| Plinio | | - | Italian, Spanish | |
| Plinius | | - | Ancient Roman | |
| Ploutarchos | | - | Ancient Greek | |
| Pluto | | PLOO-to (English) | Greek Mythology (Latinized), Roman Mythology | |
| Pocahontas | | - | History, Native American, Algonquin | |
| Poghos | | - | Armenian | |