| Riddock | Irish | Meaning "smooth field."
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| Riley | Irish | Meaning "valiant." |  | |
| Riocard | Irish | Gaelic form of Richard (brave ruler.. | | |
| Rioghnach | Irish | Gaelic name derived from rioghan (q.. | | |
| Riona | Irish | Popular Anglicized form of Rioghnac.. |  | |
| Riordan | Irish | Meaning "bard; royal poet." General.. | | |
| Risteard | Irish | Gaelic form of Richard (brave ruler.. | | |
| Robert | Irish | Introduced by the Anglo-Norman sett.. |  | |
| Robin | Irish | A pet form of Robert, Robin is also.. | | |
| Roderick | Irish | Introduced by the Norsemen in the f.. | | |
| Rogan | Irish | Meaning "redhead."
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| Roibeard | Irish | Gaelic form of Robert (bright fame).. | | |
| Roibin | Irish | Gaelic form of Robin, a pet form of.. | | |
| Rois | Irish | Gaelic form of Rose. See Rose | | |
| Roisin | Irish | Irish form of Rosaleen, which is a .. | | |
| Ronan | Irish | Very old name derived from the dimi.. | | |
| Rooney | Irish | Meaning "red-haired." This is usual.. | | |
| Rori | Irish | Meaning "red-headed ruler" is the f.. | | |
| Rory | Irish | Anglicized form of Ruairi (red, rus.. | | |
| Rosaleen | Irish | Diminutive form of Rose (a horse; a.. | | |
| Rose | Irish | Originally a short form of any of t.. | | |
| Rowan | Irish | Popular Anglicized form of Ruadhan .. | | |
| Rowena | Irish | Meaning "white mane."
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| Roy | Irish | A borrowing from the Scottish, Roy .. | | |
| Ruadhan | Irish | Diminutive form of ruadh (red): hen.. | | |
| Ruaidhri | Irish | Gaelic form of the name Roderick (f.. | | |
| Ruairi | Irish | Irish name derived from the Gae.. | | |
| Rut | Irish | Gaelic form of Ruth. See Ruth, | | |
| Ruth | Irish | Of uncertain etymology, some believ.. | | |
| Ryan | Irish | Transferred use of the Anglicized s.. | | |
| Ryanne | Irish | A name that means "little ruler," i.. | | |
| Sabia | Irish | Anglicized form of Sive and the Gae.. | | |
| Sabina | Irish | Derived from the Latin Sablna (Sabi.. | | |
| Sadhbh | Irish | Very old name meaning "goodness." S.. | | |
| Saebhreathach | Irish | Compound name composed of the Gaeli.. | | |
