| Luciana | | loo-CHAH-nah (Italian), loo-THYAH-nah (Spanish), loo-SYAH-nah (Latin American Spanish) | Italian, Spanish, Portuguese, Ancient Roman | |
| Lucianus | | - | Ancient Roman | |
| Lucilia | | - | Ancient Roman | |
| Lucilius | | - | Ancient Roman | |
| Lucilla | | - | Italian, Ancient Roman | |
| Lucina | | loo-SEEN-ə (English) | Roman Mythology | |
| Lucius | | LOO:-ki-uws (Ancient Roman), LOO-shəs (English), LOO-see-əs (English) | Ancient Roman, Biblical, English | |
| Lucretia | | - | Ancient Roman, Roman Mythology | |
| Lucretius | | - | Ancient Roman | |
| Luiza | | luw-EE-zah (Polish) | Polish, Portuguese, Romanian | |
| LuminiȚA | | loo-mee-NEE-tsah | Romanian | |
| Luna | | - | Roman Mythology | |
| Luned | | LIN-ed (Welsh) | Welsh, Welsh Mythology, Arthurian Romance | |
| Lunete | | - | Welsh Mythology, Arthurian Romance | |
| Lupus | | - | Late Roman | |