| Polykarpos | | - | Ancient Greek | |
| Pompeius | | - | Ancient Roman | |
| Pompilius | | - | Ancient Roman | |
| Pomponia | | - | Ancient Roman | |
| Pomponius | | - | Ancient Roman | |
| Pontius | | PAHN-shəs (English), PAHN-tee-əs (English) | Ancient Roman, Biblical Latin, Biblical | |
| Porcia | | - | Ancient Roman | |
| Porcius | | - | Ancient Roman | |
| Porphyrios | | - | Ancient Greek | |
| Praxiteles | | - | Ancient Greek | |
| Prisca | | PRIS-kə (English) | Biblical, Dutch, Ancient Roman, Biblical Latin | |
| Priscilla | | pri-SIL-ə (English), pree-SHEEL-lah (Italian) | English, French, Italian, Ancient Roman, Biblical Latin, Biblical | |
| Priscus | | - | Ancient Roman | |
| Prochoros | | - | Ancient Greek, Biblical Greek | |
| Prokopios | | - | Ancient Greek | |