| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 681 | Leander | Greek | Lion man. In Greek mythology, Leander swam across the Hellespont each night to meet his lover, the priestess Hero. | M | |
| 682 | Leandro | Greek | Lion. | M | |
| 683 | Leksi | Greek | Defender of man. | M | |
| 684 | Leon | Greek | A variant of Leo: Lion. | M | |
| 685 | Lethe | Greek | River of oblivion. | M | |
| 686 | Lex | Greek | Diminutive of Alexander: Defender of men. Alexander the Great was a 4th century Macedonian king for whom the Egyptian city of Alexandria is named. Eight popes and three Russian emperors have been named Alexander. | M | |
| 687 | Lichas | Greek | Hercules' friend. | M | |
| 688 | Linus | Greek | Flaxen haired. Net. A Christian companion to Paul in Rome. | M | |
| 689 | Lipp | Greek | Lover of horses. | M | |
| 690 | Lippi | Greek | Lover of horses. | M | |
| 691 | Lippio | Greek | Lover of horses. | M | |
| 692 | Lizandra | Greek | Liberator. Feminine of Lysander. | M | |
| 693 | Loxias | Greek | Crooked. | M | |
| 694 | Lucas | Greek | Variant of Luke: Light giving. From Lucania (Lucania was a district of ancient Italy). | M | |
| 695 | Luke | Greek | Light giving. From Lucania (Lucania was a district of ancient Italy). Luke was the author of the Acts of the Apostles and of the third Gospel in the New Testament, the patron saint of doctors and artists, and was known as 'the beloved physician'. | M | |
| 696 | Lycaon | Greek | A king of Arcadia. | M | |
| 697 | Lycomedes | Greek | A king of Scyros. | M | |
| 698 | Lycurgus | Greek | A king of the Edones. | M | |
| 699 | Lynceus | Greek | An Argonaut. | M | |
| 700 | Lysander | Greek | Liberator. Lysander is one of the main characters in Shakespeare's A Midsummer Night's Dream. | M | |