| Pertto | A Finnish variation of Peter. |
| Perttu | Son of Talmai; Rich in Land |
| Perttuli | A diminutive form of Perttu. |
| Perttyli | A rare Finnish name variant. |
| Peti | A short form of the name Peter. |
| Petja | A Russian diminutive of Peter. |
| Petju | A variant of the name Peter. |
| Pette | A short form of the name Peter. |
| Petteri | A Finnish form of Peter, meaning rock. |
| Petu | Loving; Kindness; Charity |
| Pieta | Derived from the Latin word for pity. |
| Pietar | An Estonian variant meaning a stone. |
| Pieti | A Finnish pet form meaning a rock. |
| Piett | A rare name meaning a small stone. |
| Pietto | A variant name meaning a firm rock. |
| Pietu | A Finnish name meaning a solid rock. |
| Pirje | To Save or Help or Protect |
| Pirjeri | To Save or Help or Protect |
| Pirkeri | To Help or Save or Protect |
| Pirkka | A Finnish name meaning a bright one. |
| Poakki | A rare name meaning a small stone. |
| Poaval | A variant form meaning small rock. |
| Poavo | A variant of the name Paul. |
| Pontianus | Man from Pontia |
| Pontte | A Finnish form of Pontius. |
| Pontti | A Finnish diminutive name. |
| Ponttius | Derived from the Latin bridge. |
| Ponttu | A playful Finnish nickname. |
| Porissa | Battle Glory; Small |
| Potte | A name of Scandinavian origin. |
| Prami | A name meaning first or chief. |
| Prankku | A rare and unique given name. |
| Pranse | A name meaning to show off. |
| Pransse | A variant of the name Pranse. |
| Pranssi | Frenchman; Free Man |
| Pranssu | Frenchman; Free Man |
| Pratu | A Sanskrit name meaning a gateway. |
| Preeri | Derived from the word for prairie. |
| Prekti | Bright; Shining |
| Pruuno | A name meaning a shade of brown. |