| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 581 | Kennard | Gaelic | Brave chieftain. | M | |
| 582 | Kennedy | Gaelic | Helmeted. | M | |
| 583 | Kenner | Gaelic | Brave chieftain. | M | |
| 584 | Kenyon | Gaelic | Blond. | M | |
| 585 | Keondre | Gaelic | Ancient. | M | |
| 586 | Keriam | Gaelic | Dark haired. | F | |
| 587 | Kermichaef | Gaelic | From Michael's fortress. | M | |
| 588 | Kermichil | Gaelic | From Michael's fortress. | M | |
| 589 | Kermit | Gaelic | Free. | M | |
| 590 | Kern | Gaelic | Little dark. | M | |
| 591 | Kerr | Gaelic | Spear. | M | |
| 592 | Kerry | Gaelic | Dark haired. | F | |
| 593 | Kerry | Gaelic | Dusky; dark. Kerry county in Ireland. Surname. | M | |
| 594 | Kerwen | Gaelic | Little black one. | M | |
| 595 | Kerwin | Gaelic | Little black one. | M | |
| 596 | Kerwyn | Gaelic | Little black one. | M | |
| 597 | Kevin | Gaelic | Attractive. | M | |
| 598 | Kevyn | Gaelic | Attractive. | M | |
| 599 | Key | Gaelic | Son of Aidan. | M | |
| 600 | Kian | Gaelic | ancient. | M | |