| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 381 | Kaitleen | Irish | Modern phonetic form of the Irish name Caitlin from Catherine meaning pure. | F | |
| 382 | Kaitlin | Irish | Modern phonetic form of the Irish name Caitlin from Catherine meaning pure. | F | |
| 383 | Kaitlyn | Irish | Modern phonetic form of the Irish name Caitlin from Catherine meaning pure. | F | |
| 384 | Kaitlynn | Irish | Modern phonetic form of the Irish name Caitlin from Catherine meaning pure. | F | |
| 385 | Kallie | Irish | Variant of Cayley meaning from the forest. | F | |
| 386 | Kasey | Irish | Vigilant. | F | |
| 387 | Kasie | Irish | Alert. vigorous. Modern variant of Casey. | F | |
| 388 | Kate | Irish | Diminutive of Katherine: Pure. Clear. From the Gaelic form Caitlin. | F | |
| 389 | Kath | Irish | Diminutive of Katherine: Pure. Clear. From the Gaelic form Caitlin. | F | |
| 390 | Katherine | Irish | Pure. Clear. From the Gaelic form Caitlin. | F | |
| 391 | Kathleen | Irish | Variant of Katherine: Pure. Clear. Innocent. From the Gaelic form Caitlin. | F | |
| 392 | Kathleena | Irish | Variant of Caitlin derived from Katherine. Pure. | F | |
| 393 | Kathlene | Irish | Variant of Caitlin derived from Katherine. Pure. | F | |
| 394 | Kathlynn | Irish | Variant of Caitlin derived from Katherine. Pure. | F | |
| 395 | Kathryn | Irish | Variant of Katherine: Pure. Clear. Innocent. From the Gaelic form Caitlin. | F | |
| 396 | Kathy | Irish | Diminutive of Katherine: Pure. Clear. From the Gaelic form Caitlin. | F | |
| 397 | Katie | Irish | Diminutive of Katherine: Pure. Clear. From the Gaelic form Caitlin. | F | |
| 398 | Katy | Irish | Diminutive of Katherine: Pure. Clear. From the Gaelic form Caitlin. | F | |
| 399 | Kay | Irish | Diminutive of Katherine: Pure. Clear. From the Gaelic form Caitlin. | F | |
| 400 | Keana | Irish | Feminine of Keane meaning ancient. | F | |