| Rafferty | Unisex | Irish Names |
| Raghnall | Man | Irish Names |
| Reagan | Unisex | Irish Names |
| Redmond | Man | Irish Names |
| Regan | Unisex | Irish Names |
| Reilly | Unisex | Irish Names |
| Renny | Unisex | Irish Names |
| Rian | Man | Irish Names |
| Rihanna | Woman | Irish Names |
| Riley | Unisex | Irish Names |
| 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 |