| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| ParthalÁN | PAHR-ha-lawn | Irish Mythology | ||
| Patrick | PAT-rik (English), pat-REEK (French), PAHT-rik (German) | Irish, English, French, German | ||
| Patsy | PAT-see | English, Irish | ||
| Peadar | PAD-ar | Irish, Scottish | ||
| Phelan | - | Irish | ||
| Phelim | - | Irish | ||
| Piaras | PEE-a-rus | Irish | ||
| Pilib | - | Irish | ||
| Proinsias | - | Irish | ||
| Quinn | KWIN | Irish, English | ||
| RÁIchÉAl | - | Irish | ||
| RÉAmann | - | Irish | ||
| RÍAn | - | Irish | ||
| RÍGhnach | - | Irish Mythology | ||
| RÍOghnÁN | - | Irish |