| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 481 | Keir | Celtic | Dark skinned. | M | |
| 482 | Kelvan | Celtic | 'River man.'. | M | |
| 483 | Kelven | Celtic | River man. | M | |
| 484 | Kelvin | Celtic | From the narrow river. | M | |
| 485 | Kelvyn | Celtic | From the narrow river. | M | |
| 486 | Kelwin | Celtic | From the narrow river. | M | |
| 487 | Kelwyn | Celtic | From the narrow river. | M | |
| 488 | Kendal | Celtic | From the bright valley. | M | |
| 489 | Kendall | Celtic | From the bright valley. | M | |
| 490 | Kendhal | Celtic | From the bright valley. | M | |
| 491 | Kenneth | Celtic | Handsome. | M | |
| 492 | Kennocha | Celtic | Lovely. | F | |
| 493 | Kent | Celtic | Chief. | M | |
| 494 | Kentigem | Celtic | Chief. | M | |
| 495 | Kentigern | Celtic | Chief lord. Name of the first bishop of Glasgow. | M | |
| 496 | Kermit | Celtic | Son of Diarmaid. | M | |
| 497 | Kermode | Celtic | Son of Diarmaid. | M | |
| 498 | Kerry | Celtic | Dark. | M | |
| 499 | Kerwin | Celtic | Dark skinned. | M | |
| 500 | Kerwyn | Celtic | Dark skinned. | M | |