| Riona | Woman | Irish Names |
| Riordan | Man | Irish Names |
| Róisín | Woman | Irish Names |
| Ronan | Man | Irish Names |
| Ronat | Woman | Irish Names |
| Rooney | Unisex | Irish Names |
| Rory | Unisex | Irish Names |
| Rosaleen | Woman | Irish Names |
| Ruaidhrà | Man | Irish Names |
| RuaidhrÍ | Man | Irish Names |
| Ruairí | Man | Irish Names |
| Ryan | Unisex | Irish Names |
| Ryane | Woman | Irish Names |
| Rylee | Unisex | Irish Names |
| Rylie | Unisex | Irish Names |
| Sabia | Woman | Irish Names |
| Sadb | Woman | Irish Names |
| Sadhbh | Woman | Irish Names |
| Saeran | Man | Irish Names |
| Saoirse | Woman | Irish Names |