| Liviana | | lee-VYAH-nah (Italian) | Italian, Ancient Roman | |
| Livianus | | - | Ancient Roman | |
| Livius | | - | Ancient Roman | |
| Longina | | lawn-GEE-nah (Polish) | Polish, Ancient Roman | |
| Longinus | | - | Ancient Roman | |
| Loukios | | - | Ancient Roman (Hellenized), Biblical Greek | |
| Lucanus | | - | Ancient Roman | |
| Lucia | | loo-CHEE-ah (Italian), LOO-tsee-ah (German), LOO-shə (English), loo-SEE-ə (English) | Italian, German, English, Swedish, Norwegian, Danish, Romanian, Slovak, Ancient Roman | |
| 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 | |
| Lucius | | LOO:-ki-uws (Ancient Roman), LOO-shəs (English), LOO-see-əs (English) | Ancient Roman, Biblical, English | |
| Lucretia | | - | Ancient Roman, Roman Mythology | |