| Kou | Peaceful; Intelligent; Bright |
| Krugan | Strong and powerful warrior |
| Kaysar | A leader with royal authority. |
| Kaaleppi | A name meaning wholehearted or bold. |
| Kaape | God's Messenger; God's Guy |
| Kaaperi | God's Messenger; God's Guy |
| Kaapi | God's Messenger; God's Guy |
| Kaappo | A name meaning the protector of men. |
| Kaappoo | God's Messenger; God's Guy |
| Kaapre | God's Messenger; God's Guy |
| Kaaprel | A variant of Gabriel meaning God is my strength. |
| Kaaprelli | A Finnish diminutive form of the name Gabriel. |
| Kaapri | A Finnish name derived from the island of Capri. |
| Kaata | A name meaning pure or clear in various cultures. |
| Kaaton | A name meaning one who is pure or unblemished. |
| Kaino | A Finnish name meaning shy, modest, or bashful. |
| Kaius | A Latin name meaning to rejoice or be happy. |
| Kajus | A variant of Gaius meaning to be joyful. |
| Kalerva | A name meaning a hero from Finnish mythology. |
| Kalervo | A name meaning a hero from the Kalevala epic. |
| Kaleva | A mythical giant from Finnish lore. |
| Kalewa | A variant of the Finnish giant name. |
| Kalkke | Derived from the word for limestone. |
| Kalkko | A name related to lime or chalk dust. |
| Kalkku | A term referring to a lime deposit. |
| Kallukka | A name meaning a small rocky place. |
| Kanut | Knot; White-haired |
| Kape | Strength of God |
| Kapo | A term for a supervisor or overseer. |
| Kapu | A name meaning a captain or leader. |
| Karjus | Spear of the Gods |
| Kartsa | Gust of Wind; Curly Haired; Pure |
| Kaspe | Guardian of the Treasure |
| Kasperi | Keeper of the Treasure |
| Kaspo | A name meaning a keeper of the store. |
| Kassu | A nickname for a person named Kalle. |
| Kastanja | Finnish word for chestnut tree. |
| Kauko | Means distant or farreaching. |
| Kauno | Derived from the word for beauty. |
| Kauppi | Sup-planter; Held by the Heel |