| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 1601 | Leucippe | Greek | Mother of Teuthras. | F | |
| 1602 | Leucothea | Greek | A sea nymph. | F | |
| 1603 | Leucothia | Greek | A sea nymph. | F | |
| 1604 | 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 | |
| 1605 | Lexandra | Greek | Defender of mankind. Feminine of Alexander. | F | |
| 1606 | Lexina | Greek | Defender of man. | F | |
| 1607 | Lexine | Greek | Defender of man. | F | |
| 1608 | Leyda | Greek | Variant of Leda who was the Mythological queen of Sparta and mother of Helen of Troy. | F | |
| 1609 | Lia | Greek | Bringer of good news. | F | |
| 1610 | Libby | Greek | Diminutive of Elizabeth: From the Hebrew Elisheba, meaning either oath of God, or God is satisfaction. Famous bearer: Old Testament Elizabeth was mother of John the Baptist and one of the earliest known bearers of this name; Queen Elizabeth II. | F | |
| 1611 | Lichas | Greek | Hercules' friend. | M | |
| 1612 | Liddy | Greek | Diminutive of Lydia: Woman from Lydia (in Asia Minor). | F | |
| 1613 | Liesel | Greek | Variant of Elizabeth: From the Hebrew Elisheba, meaning either oath of God, or God is satisfaction. | F | |
| 1614 | Liesl | Greek | Variant of Elizabeth: From the Hebrew Elisheba, meaning either oath of God, or God is satisfaction. | F | |
| 1615 | Ligia | Greek | Beautiful voice. | F | |
| 1616 | Lila | Greek | Lily. | F | |
| 1617 | Lilch | Greek | Lily. | F | |
| 1618 | Lili | Greek | Diminutive of Elizabeth: From the Hebrew Elisheba, meaning either oath of God, or God is satisfaction. Also, the lilly flower. | F | |
| 1619 | Lilia | Greek | Lily. | F | |
| 1620 | Lilis | Greek | Lily. | F | |