| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 741 | Inys | Irish | From the river island. | M | |
| 742 | Jarlath | Irish | Tributary lord. | M | |
| 743 | Justin | Irish | Judicous. | M | |
| 744 | Kagan | Irish | A thinker; fiery. Form of Hugh. | M | |
| 745 | Kagen | Irish | A thinker; fiery. Form of Hugh. | M | |
| 746 | Kane | Irish | Fighter. | M | |
| 747 | Karney | Irish | Variant of Carney: Champion; victorious. | M | |
| 748 | Karny | Irish | Variant of Carney: Champion; victorious. | M | |
| 749 | Kasey | Irish | Variant of Casey: Observant; alert; vigorous. | M | |
| 750 | Kathlynn | Irish | Variant of Caitlin derived from Katherine. 'Pure.'. | M | |
| 751 | Kavan | Irish | Handsome. | M | |
| 752 | Kaven | Irish | Handsome. | M | |
| 753 | Keagan | Irish | A thinker; fiery. Form of Hugh. | M | |
| 754 | Kealan | Irish | Slender. | M | |
| 755 | Keallach | Irish | Variant of Ceallach: War; strife. | M | |
| 756 | Kealy | Irish | Handsome. | M | |
| 757 | Kean | Irish | Archaic. | M | |
| 758 | Keanan | Irish | Ancient. | M | |
| 759 | Keandre | Irish | Ancient. | M | |
| 760 | Keane | Irish | Ancient. | M | |