| Kerri | Woman | Irish Names |
| Kerry | Unisex | Irish Names |
| Kevin | Man | Irish Names |
| Kevine | Woman | Irish Names |
| Kian | Man | Irish Names |
| Kiandra | Woman | Irish Names |
| Kiara | Woman | Irish Names |
| Kieran | Unisex | Irish Names |
| Kiernan | Man | Irish Names |
| Kieve | Unisex | Irish Names |
| Kiley | Unisex | Irish Names |
| Killian | Unisex | Irish Names |
| Kinley | Unisex | Irish Names |
| Kiva | Woman | Irish Names |
| Kody | Unisex | Irish Names |
| Laoghaire | Woman | Irish Names |
| Laoise | Woman | Irish Names |
| Lennon | Unisex | Irish Names |
| Líadáin | Woman | Irish Names |
| Liam | Man | Irish Names |