| Keira | Woman | Irish Names |
| Keiran | Man | Irish Names |
| Keitha | Woman | Irish Names |
| Kella | Woman | Irish Names |
| Kellan | Man | Irish Names |
| Kellen | Unisex | Irish Names |
| Kelley | Unisex | Irish Names |
| Kelly | Unisex | Irish Names |
| Kellyn | Woman | Irish Names |
| Kelsea | Woman | Irish Names |
| Kenadie | Unisex | Irish Names |
| Kennan | Man | Irish Names |
| Kennedy | Unisex | Irish Names |
| Kerra | Woman | Irish Names |
| Kerri | Woman | Irish Names |
| Kerry | Unisex | Irish Names |
| Kevin | Man | Irish Names |
| Kevine | Woman | Irish Names |
| Kian | Man | Irish Names |
| Kiandra | Woman | Irish Names |