| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 661 | Kristian | Greek | Christian. | M | |
| 662 | Kristofr | Greek | Christ bearer. | M | |
| 663 | Kristor | Greek | Christ bearer. | M | |
| 664 | Kristr | Greek | Anointed. | M | |
| 665 | Krystalynn | Greek | Variant of Crystal. Sparkling. 'K' from the Greek spelling of krystallos. | M | |
| 666 | Krystupasr | Greek | Christ bearer. | M | |
| 667 | Krzysztofr | Greek | Christian. | M | |
| 668 | Kuirilr | Greek | Lordly. | M | |
| 669 | Kyrillos | Greek | Lordly. | M | |
| 670 | Kyrillosr | Greek | Lordly. | M | |
| 671 | Kyros | Greek | Master. | M | |
| 672 | Ladon | Greek | Dragon of Hera. | M | |
| 673 | Laertes | Greek | Father of Odysseus. | M | |
| 674 | Laestrygones | Greek | A tribe of giants. | M | |
| 675 | Laius | Greek | Father of Oedipus. | M | |
| 676 | Lander | Greek | Lion. | M | |
| 677 | Laocoon | Greek | Son of Priam. | M | |
| 678 | Laomedon | Greek | Father of Priam. | M | |
| 679 | Lasse | Greek | People's victory. | M | |
| 680 | Lazarus | Greek | God is my help. In the Bible, Lazarus was brother to Mary and Martha and was raised from the dead after four days. | M | |