| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| KĘStutis | - | Lithuanian | ||
| Kajus | - | Lithuanian | ||
| KamilĖ | - | Lithuanian | ||
| Karolina | kah-raw-LEE-nah (Polish), kah-ro-LEE-nah (Swedish, German) | Polish, Swedish, Norwegian, Danish, Hungarian, Slovene, Croatian, Macedonian, Lithuanian, German | ||
| Karolis | - | Lithuanian | ||
| Kasparas | - | Lithuanian | ||
| KatrĖ | - | Lithuanian | ||
| Kazimieras | - | Lithuanian | ||
| Kotryna | - | Lithuanian | ||
| Kristijonas | - | Lithuanian | ||
| Kristina | kris-TEE-nah (German) | Swedish, Norwegian, Danish, Russian, German, Slovene, Czech, Lithuanian, Serbian, Croatian, Faroese, | ||
| Kristupas | - | Lithuanian |