| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 541 | Kaley | Gaelic | Slender; fair. Form of Caelan. | M | |
| 542 | Kalin | Gaelic | Slender; fair. Form of Caelan. | M | |
| 543 | Kallan | Gaelic | Powerful in battle. | F | |
| 544 | Kallie | Gaelic | Variant of Cayley meaning from the forest. | F | |
| 545 | Kane | Gaelic | Tribute. | M | |
| 546 | Kayne | Gaelic | Tribute. | M | |
| 547 | Kearn | Gaelic | Little dark. | M | |
| 548 | Keefe | Gaelic | Cherished. | M | |
| 549 | Keegan | Gaelic | Small and fiery. | M | |
| 550 | Keelan | Gaelic | Slender; fair. | M | |
| 551 | Kegan | Gaelic | Small and fiery. | M | |
| 552 | Keifer | Gaelic | Cherished. | M | |
| 553 | Keilan | Gaelic | Slender; fair. | M | |
| 554 | Keillan | Gaelic | Slender; fair. | M | |
| 555 | Keir | Gaelic | Dusky; dark-haired. Actor Keir Dullea. | M | |
| 556 | Keiran | Gaelic | Dusky; dark-haired. | M | |
| 557 | Kelby | Gaelic | Place by the fountain; spring. | F | |
| 558 | Kelby | Gaelic | Place by the fountain or spring. | M | |
| 559 | Kelden | Gaelic | Slender; fair. | M | |
| 560 | Kellan | Gaelic | Slender; fair. | F | |