| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Kaito | kah-ee-to | Japanese | ||
| Kaja (1) | KAH-yah (Swedish, Estonian) | Norwegian, Danish, Swedish, Estonian, Slovene | ||
| Kaja (3) | KAH-yah | Estonian | ||
| Kalev (1) | - | Estonian | ||
| Kalju | - | Estonian | ||
| KandaĴA | kahn-DAH-zhah | Esperanto | ||
| Kanon | kah-non | Japanese | ||
| Kaori | kah-o-ṙee | Japanese | ||
| Kaoru | kah-o-ṙoo | Japanese | ||
| Karesinda | kah-re-SEEN-dah | Esperanto | ||
| Karma | - | Bhutanese | ||
| Kasih | - | Indonesian, Malay | ||
| Kasumi | kah-soo-mee | Japanese | ||
| Katariina | KAH-tah-ree:-nah (Finnish) | Finnish, Estonian | ||
| Katashi | kah-tah-shee | Japanese |