| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Kirk | KURK | English | ||
| Kirsten | KEER-sten (Danish, Norwegian), KUR-stən (English) | Danish, Norwegian, English | ||
| Kit | KIT | English | ||
| Kitty | KIT-ee | English | ||
| Kizzie | KIZ-ee | English | ||
| Kizzy | KIZ-ee | English | ||
| Knox | NAHKS | English | ||
| Koby | KO-bee | English (Modern) | ||
| Kodey | KO-dee | English (Rare) | ||
| Kody | KO-dee | English (Modern) | ||
| Kolby | KOL-bee | English (Modern) | ||
| Kole | KOL | English (Modern) | ||
| Kolleen | kah-LEEN | English (Rare) | ||
| Konnor | KAHN-ər | English (Modern) | ||
| Korbin | KAWR-bin | English (Modern) |