| Pias | Means a pious or holy person. |
| Pice | Derived from Latin, meaning 'price' or 'value' |
| Picel | Derived from Latin, meaning 'price' or 'value' |
| Pidda | Derived from Old English, meaning 'peace' or 'tranquility' |
| Piety | Derived from Latin, meaning 'devotion' or 'reverence' |
| Pignores | Derived from Latin, meaning 'from the pine trees' |
| Pil | Derived from Latin, meaning 'pilgrim' or 'traveler' |
| Pilheard | Derived from Old English, meaning 'pilgrim' or 'traveler' |
| Pillaines | Derived from Old English, meaning 'pilgrim' or 'traveler' |
| Pinel | Derived from French, meaning 'pine tree' or 'evergreen' |
| Pinna | Small wing or ear |
| Pires | Derived from the name Peter. |
| Piuda | Peaceful or gentle |
| Plechelm | People's protection or helmet |
| Pleghelm | People's protection or helmet |
| Plegmund | People's protection or helmet, mighty |
| Plenorius | One who is full of honor. |
| Pocel | A name of Slavic origin. |
| Pocg | An acronym for a group name. |
| Pohha | A name of Finnish origin. |
| Polidore | Meaning many gifts given. |
| Poncius | Derived from the sea coast. |
| Ponyboy | One who Likes Horses |
| Poss | A short form of the name. |
| Possa | A name of uncertain origin. |
| Pov | An abbreviation for point. |
| Preed | Leader or prince |
| Pren | A name meaning from the hill. |
| Pres | Priest's Meadow; Priest Town; From .... |
| Preshil | From the church |
| Pressleyl | From the church |
| Prestan | One who lives by a meadow. |
| Priadan | From the priest |
| Priamus | From the priest |
| Prim | Primrose; Flower |
| Prinse | A name meaning royal leader. |
| Priscus | An ancient Roman surname. |
| Protec | One who acts as a guardian. |
| Pruda | A type of fungus, possibly a species of mushroom. |
| Prvce | A type of plant, possibly a species of grass or herb. |