| Name | Group | Language of Origin | Languages of Use | Meaning/Translation or Related Words | US 2021 |
|---|
| Orinda | Orinda | Unknown | English | | |
| Orion | Orion | Old Greek | German, English | Words: urine | #314 |
| Orla | Orla | Old Irish | English, Irish | golden princess | |
| Orson | Orson | Old French | English | | |
| Osbaldo | Oswald | Old High German | English | Words: Ass / rule | |
| Osbert | Osbert | Old English | German, English | Words: deity / bright | |
| Oscar | Oskar | Old Norse | Italian, English, French | Words: ase, deity / spear | #226 |
| Osiris | Osiris | Egyptian | English | | #947 |
| Ossian | Oisín | Old Irish | English | | |
| Oswald | Oswald | Old High German | German, French, English | Words: Ass / rule | |
| Oswin | Oswin | Old English | German, English | Words: deity / friend | |
| Othello | Otto/Ute | Old High German | English | Words: wealth | |
| Otis | Otis | English | English | | #646 |
| Otto | Otto/Ute | Old High German | German, Italian, French, English | Words: wealth | #335 |
| Ovid | Ovid | Latin | English | | |
| Owen | Owen | Welsh | English, Welsh | | #22 |
| Owen | Eoghan | Celtic | English, Irish | Words: yew | |
| Ozzy | Oswald | Old High German | English | Words: Ass / rule | #712 |
| Paddy | Patrick/Patrizia | Latin | English | nobleman | |
| Page | Paige | English | English | the page | |
| Páidí | Patrick/Patrizia | Latin | English, Irish | nobleman | |
| Paige | Paige | English | English | the page | #300 |
| Paislee | Paisley | Old Irish | English | | #419 |
| Paisleigh | Paisley | Old Irish | English | | #867 |
| Paisley | Paisley | Old Irish | English | | #52 |
| Paityn | Payton/Payton | Old English | English | peacock town | #936 |
| Palmatius | Palmatius | Latin | German, English | palm bearer | |
| Palmer | Palmiro/Palmira | Latin | English | | #986 |
| Palmer | Palmiro/Palmira | Latin | English | | #329 |
| Pam | Pamela | Old Greek | German, Italian, English | maybe all black (?), all honey | |
| Pamela | Pamela | Old Greek | German, Italian, English | maybe all black (?), all honey | |
| Pancras | Pankraz | Old Greek | English | all power | |
| Pandora | Pandora | Old Greek | German, English | all gifts | |
| Pansy | Pansy | English | English, Irish | | |
| Paris | Paris/Paris | Old Greek | English | | |
| Paris | Paris/Paris | Old Greek | English | | #444 |
| Parker | Parker/Parker | Old French | English | park warden | #115 |
| Parker | Parker/Parker | Old French | English | park warden | #93 |
| Parthena | Parthenia | Old Greek | English | maiden, virgin | |
| Parthenia | Parthenia | Old Greek | English | maiden, virgin | |
| Pat | Patrick/Patrizia | Latin | English | nobleman | |
| Pat | Patrick/Patrizia | Latin | English | nobleman | |
| Patience | Patience | English | English | patience | |
| Patric | Patrick/Patrizia | Latin | French, English | nobleman | |
| Patrice | Patrick/Patrizia | Latin | English, French | nobleman | |
| Patrice | Patrick/Patrizia | Latin | English | nobleman | |
| Patricia | Patrick/Patrizia | Latin | Portuguese, Spanish, English | nobleman | |
| Patrick | Patrick/Patrizia | Latin | German, French, English, Irish | nobleman | #213 |
| Patsy | Patrick/Patrizia | Latin | English | nobleman | |
| Patty | Patrick/Patrizia | Latin | English | nobleman | |
| Paul | Paul/Paula | Latin | German, English, French | the small, the humble | #257 |
| Paula | Paul/Paula | Latin | German, Spanish, French, English | the small, the humble | #821 |
| Pauline | Paul/Paula | Latin | German, French, English | the small, the humble | |
| Paxton | Paxton | Old English | English | Words: town, settlement, homestead | #255 |
| Payten | Payton/Payton | Old English | English | peacock town | |
| Payton | Payton/Payton | Old English | English | peacock town | #265 |
| Payton | Payton/Payton | Old English | English | peacock town | |
| Pearl | Pearl | English | English, Irish | pearl | #750 |
| Pearlie | Pearl | English | English | pearl | |
| Pearline | Pearl | English | English | pearl | |
| Peggy | Margarete | Old Greek | English | the pearl | |
| Pelagia | Pelagius/Pelagia | Old Greek | German, English, Greek | Words: sea | |
| Pelagius | Pelagius/Pelagia | Old Greek | German, English | Words: sea | |
| Penelope | Penelope | Old Greek | German, English | | #23 |
| Pennie | Penelope | Old Greek | English | | |
| Penny | Penelope | Old Greek | English | | #704 |
| Perce | Percival | Celtic | English | | |
| Percival | Percival | Celtic | English | | |
| Percy | Percival | Celtic | English | | |
| Perdita | Perdita | Latin | German, English | the lost | |
| Peregrine | Peregrine | Latin | English | traveller, pilgrim | |
| Perry | Peregrine | Latin | English | traveller, pilgrim | |
| Persephone | Persephone | Old Greek | German, English | Words: murder, slaughter | #775 |
| Pete | Peter/Petra | Old Greek | English | the rock, the stone | |
| Peter | Peter/Petra | Old Greek | German, Scandinavian, English | the rock, the stone | #215 |
| Petra | Peter/Petra | Old Greek | German, English, Hungarian | the rock, the stone | |
| Petronel | Petronio/Petronia | Latin | English | | |
| Petronella | Petronio/Petronia | Latin | German, Dutch, English | | |
| Petronilla | Petronio/Petronia | Latin | German, Italian, English | | |
| Petula | Petula | Unknown | English | | |
| Peyton | Payton/Payton | Old English | English | peacock town | #470 |
| Peyton | Payton/Payton | Old English | English | peacock town | #99 |
| Phaedra | Phaedra | Old Greek | German, English | | |
| Phil | Philip/Philippa | Old Greek | English | friend of horses | |
| Philbert | Filibert/Filiberta | Old High German | French, English | Words: bright | |
| Philemon | Philemon | Old Greek | German, English | affectionate | |
| Philip | Philip/Philippa | Old Greek | English | friend of horses | #451 |
| Philippa | Philip/Philippa | Old Greek | German, English | friend of horses | |
| Phillip | Philip/Philippa | Old Greek | English | friend of horses | #522 |
| Phillis | Phyllis | Old Greek | English | | |
| Philomena | Filomeno/Philomena | Old Greek | German, English | | |
| Phoebe | Phoebe | Old Greek | German, English | bright, pure | #247 |
| Phoebus | Phoebus | Old Greek | English | bright, pure | |
| Phoenix | Phoenix/Phoenix | Old High German | English | dark red | #248 |
| Phoenix | Phoenix/Phoenix | Old High German | English | dark red | #308 |
| Phylis | Phyllis | Old Greek | English | | |
| Phyliss | Phyllis | Old Greek | English | | |
| Phyllis | Phyllis | Old Greek | German, English | | |
| Pia | Pius/Pia | Latin | German, Italian, French, English | Words: pious | |
| Picabo | Picabo | Unknown | English | maybe silver water | |
