| Name | Meaning | Gender | Origin |
|---|
| Kalman | Strong And Masculine | Male | French |
| Karel | Strong | Male | Dutch |
| Karla | Strong | Female | French |
| Karlens | Strong And Masculine | Male | French |
| Karlis | Strong And Masculine | Male | French |
| Karlitis | Strong And Masculine | Male | French |
| Karoly | Strong And Masculine | Male | French |
| Kedar | Strong | Male | Arabic |
| Kemen | Strong | Male | Spanish |
| Kemena | Strong | Female | Spanish |
| Kemina | Strong | Female | Spanish |
| Ken | Strong; Physically Healthy | Male | Japanese |
| Kenichi | Strong One | Male | Japanese |
| Kenji | Intelligent Second Son; Strong And Vigorous | Male | Japanese |
| Kirek | "The Strong One, The Brave One" | Female | English |
| Konnyr | Strong Willed Or Wise Hound-Lover. Variant Of Connor. | Male | Irish |
| Locke | Lives By The Stronghold | Male | English |
| Lun | Strong | Male | Irish |
| Lunn | Strong | Male | Irish |
| Mac Bhriain | Son Of The Strong | Male | Gaelic |
| Mac Ghille-Laider | Son Of The One Who Serves The Strong Armed | Male | Gaelic |
| Maelwine | Strong Friend | Male | English |
| Maganhildi | Strong Battle Maiden | Female | German |
| Magnhilda | Strong Battle Maiden | Female | German |
| Magnild | Strong Battle Maiden | Female | German |
| Magnilda | Strong Battle-Maid | Female | German |
| Magnilde | Strong Battle Maiden | Female | German |
| Mahoyu | Strong; Tough | Male | Chamoru |
| Maiti | Strong Battle Maiden | Female | Irish |
| Maitilda | Strong Battle Maiden | Female | Irish |