| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 401 | Kerr | Scottish | Man of strength. | M | |
| 402 | Kin | Scottish | From the top of the cliff. | M | |
| 403 | Kinney | Scottish | Abbreviation of Kenneth. Surname. | M | |
| 404 | Kinnon | Scottish | Fair born. | M | |
| 405 | Kinny | Scottish | From the top of the cliff. | M | |
| 406 | Kirk | Scottish | From the church. | M | |
| 407 | Kirkland | Scottish | Church. | M | |
| 408 | Kirklin | Scottish | Church. | M | |
| 409 | Kirklyn | Scottish | Church. | M | |
| 410 | Kyle | Scottish | Strait. Channel. Narrow. Used as both a surname and first name. | M | |
| 411 | Kyrk | Scottish | Church. | M | |
| 412 | Kyrksen | Scottish | Church. | M | |
| 413 | Lachlan | Scottish | Warlike. Land of Fjords (referring to the Vikings). From the land of lakes. | M | |
| 414 | Laine | Scottish | Serves John. | M | |
| 415 | Laird | Scottish | Lord. | M | |
| 416 | Lamond | Scottish | Clan name. Surname. | M | |
| 417 | Lamont | Scottish | Man of law. | M | |
| 418 | Laochailan | Scottish | Waning. | M | |
| 419 | Laren | Scottish | Serves Lawrence. | M | |
| 420 | Laurie | Scottish | A diminutive of Laurence: from the place of the laurel leaves. Famous Bearer: Laurie Lee, author of Cider with Rosie (1959). | M | |