| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 641 | Khristos | Greek | Christ. | M | |
| 642 | Khrystiyanr | Greek | Christian. | M | |
| 643 | Kipr | Greek | Christ bearer. | M | |
| 644 | Kirilr | Greek | Lordly. | M | |
| 645 | Kirylr | Greek | Lordly. | M | |
| 646 | Kit | Greek | Diminutive of Christopher: From the Greek word meaning 'carrier of Christ', Famous bearer: St Christopher, patron Saint of travellers, is believed to have carried the Christ-child across a river. | M | |
| 647 | Kitr | Greek | Christ bearer. | M | |
| 648 | Klaasr | Greek | People's victory. | M | |
| 649 | Klaus | Greek | People's victory. | M | |
| 650 | Kletos | Greek | Variant of Anakletos: Calling forth; summoned. | M | |
| 651 | Kolya | Greek | Victorious army. | M | |
| 652 | Korudon | Greek | Helmeted. | M | |
| 653 | Kosmosr | Greek | Order. | M | |
| 654 | Kostas | Greek | Variant of Costa: Steady; stable. | M | |
| 655 | Kratos | Greek | Strength. | M | |
| 656 | Krikor | Greek | Vigilant. | M | |
| 657 | Kris | Greek | Diminutive of Christopher: From the Greek word meaning 'carrier of Christ', Famous bearer: St Christopher, patron Saint of travellers, is believed to have carried the Christ-child across a river. | M | |
| 658 | Krischanr | Greek | Christian. | M | |
| 659 | Krisr | Greek | Christ bearer. | M | |
| 660 | Kristabelle | Greek | Variant of Crystal. Sparkling. 'K' from the Greek spelling of krystallos. | M | |