| Peadar | Irish | Modern Gaelic form of Peter (a rock.. |  |  |
| Peg | Irish | A pet form of Margaret (a pearl), P.. | | |
| Pegeew | Irish | Meaning "a pearl," it is a familiar.. |  | |
| Peggy | Irish | A pet form of Margaret (a pearl), P.. |  | |
| Peter | Irish | A borrowing from the English, Peter.. |  | |
| Phelan | Irish | Meaning "wolf." Generally a surname.. | | |
| Philip | Irish | Introduced by the Anglo-Normans, Ph.. | | |
| Piala | Irish | Meaning "prudence."
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| Piaras | Irish | Gaelic cognate of Piers, the Old Fr.. | | |
| Pierce | Irish | A borrowing from the English, Pierc.. | | |
| Piers | Irish | Introduced to Ireland by the Anglo-.. | | |
| Pilib | Irish | Gaelic form of Philip (lover of hor.. | | |
| Piran | Irish | Meaning "prayer." He is the patron .. | | |
| Pol | Irish | Gaelic form of Paul (small). See P.. | | |
| Polly | Irish | A pet form of Mary, Polly is also b.. | | |
| Quincy | Irish | Meaning "fifth." Quincy Jones is a .. | | |
| Quinn | Irish | Transferred use of the Anglicized s.. | | |
| Rachel | Irish | From the Ecclesiastic Late Latin an.. | | |
| Radhulbh | Irish | Gaelic form of Ralph (wolf counsel).. | | |
| Rafer | Irish | Meaning "one who brings riches," it.. | | |
| Raghnall | Irish | Gaelic form of several names introd.. | | |
| Raicheal | Irish | Gaelic form of Rachel (ewe). See R.. | | |
| Ralph | Irish | A name meaning "wolf counsel," whic.. | | |
| Ranait | Irish | Meaning "graceful" or "prosperous." | | |
| Randall | Irish | Transferred use of the English surn.. | | |
| Rathnait | Irish | Feminine diminutive form of Rath, w.. | | |
| Raymond | Irish | Introduced by the Anglo-Normans, Ra.. | | |
| Reagan | Irish | Meaning "little king." Often a surn.. | | |
| Reamonn | Irish | Gaelic form of Raymond (wise protec.. | | |
| Regattite | Irish | A name that means "little ruler," i.. | | |
| Regina | Irish | Derived from the Latin regina (quee.. | | |
| Reilly | Irish | Meaning "valiant." Riley 'B. B.' Ki.. | | |
| Renny | Irish | Anglicized form of the Gaelic Rathn.. | | |
| Riana | Irish | A short form of Briana | | |
| Richard | Irish | A name introduced by the Anglo-Norm.. | | |
