| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| KAI (2) | KIE | Swedish | ||
| KAIA | - | Norwegian, Estonian | ||
| KAIJA | KIE-yah | Finnish | ||
| KAILA | - | Yiddish | ||
| KAILEE | KAY-lee | English (Modern) | ||
| KAILEY | KAY-lee | English (Modern) | ||
| KAILYN | KAY-lin | English (Modern) | ||
| KAISA | KIE-sah (Finnish) | Finnish, Estonian | ||
| KAITLIN | KAYT-lin | English (Modern) | ||
| KAITLYN | KAYT-lin | English (Modern) | ||
| KAITLYNN | KAYT-lin | English (Modern) | ||
| KAJ (2) | KIE | Swedish (Rare) | ||
| KAJA (1) | KAH-yah (Swedish, Estonian) | Norwegian, Danish, Swedish, Estonian, Slovene | ||
| KAJA (2) | KIE-ah (Polish) | Polish, Slovene | ||
| KAJA (3) | KAH-yah | Estonian |