| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 401 | Kaseeb | Arabic | Fertile. | M | |
| 402 | Kaseem | Arabic | Divided. | M | |
| 403 | Kasib | Arabic | Fertile. | M | |
| 404 | Kasim | Arabic | Divided. | M | |
| 405 | Kassim | Arabic | Divided. | M | |
| 406 | Kateb | Arabic | Writer. | M | |
| 407 | Kedar | Arabic | Strong. | M | |
| 408 | Ketifa | Arabic | Flowering. | F | |
| 409 | Khadijah | Arabic | Muhammad's first wife who the Koran describes as one of four perfect women. (Fatima and Mary and Aisha were the others. ). | F | |
| 410 | Khaldun | Arabic | Eternal. | M | |
| 411 | Khalid | Arabic | Eternal. | M | |
| 412 | Khalidah | Arabic | Eternal. | F | |
| 413 | Khalil | Arabic | Companion. | M | |
| 414 | Khanh | Arabic | Prince. Title used by central Asian tribal chieftains and ruling princes. | M | |
| 415 | Kharim | Arabic | Generous; a friend. The Koran lists generosity as one of 99 qualities of God. | M | |
| 416 | Kharouf | Arabic | Lamb. | M | |
| 417 | Khayri | Arabic | Generous. | M | |
| 418 | Khayyat | Arabic | Tailor. | M | |
| 419 | Khoury | Arabic | Priest. | M | |
| 420 | Laila | Arabic | Born at night. | F | |