| 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 | |
| MĂDĂLina | | - | Romanian | |
| Magda | | MAHK-dah (German), MAHKH-dah (Dutch), MAHG-dah (Polish) | German, Dutch, Swedish, Norwegian, Danish, Czech, Polish, Croatian, Romanian, Portuguese | |
| Magnus | | MAHNG-nus (Swedish), MAG-nəs (English) | Swedish, Norwegian, Danish, Late Roman | |
| Maia (1) | | MAY-ə (English), MIE-ə (English) | Greek Mythology, Roman Mythology, Portuguese, Georgian | |
| Maia (2) | | MAY-ə (English), MIE-ə (English) | Roman Mythology | |