| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Kirstie | - | Scottish | ||
| Kirstin | - | Scottish | ||
| Kirsty | - | Scottish | ||
| Kisecawchuck | - | Native American, Cree | ||
| Kisha | - | African American | ||
| KlÁRa | - | Hungarian, Czech, Slovak | ||
| Klaas | KLAH:S | Dutch, Low German | ||
| Klara | KLAH-rah (German, Russian, Polish) | Swedish, Norwegian, Danish, Icelandic, German, Russian, Ukrainian, Polish, Slovene, Croatian | ||
| Klasina | klah-SEE-nah | Dutch | ||
| Klaudie | - | Czech | ||
| Klaudija | - | Croatian | ||
| Klaudio | - | Croatian | ||
| Klazina | klah-ZEE-nah | Dutch | ||
| Kleisthenes | - | Ancient Greek | ||
| Kleitos | - | Ancient Greek |