| Lutgardis | | - | Ancient Germanic (Latinized) | |
| Lutz | | LUWTS | German | |
| Luule | | - | Estonian | |
| Lux | | LUKS (English) | Various | |
| Luz | | LOOTH (Spanish), LOOS (Latin American Spanish) | Spanish | |
| Luzia | | - | Portuguese, German | |
| Lyall | | - | English (Rare) | |
| Lycurgus | | - | Greek Mythology (Latinized), Ancient Greek (Latinized) | |
| Lycus | | - | Greek Mythology (Latinized), Ancient Greek (Latinized) | |
| Lyda | | - | English (Rare) | |
| Lydia | | LID-ee-ə (English), LUY-dee-ah (German, Finnish) | English, German, Finnish, Biblical, Old Church Slavic, Biblical Latin, Biblical Greek | |
| Lygia | | - | Portuguese (Brazilian) | |
| Lykke | | - | Danish | |
| Lykos | | - | Greek Mythology, Ancient Greek | |
| Lykourgos | | - | Greek Mythology, Ancient Greek | |