| Leonia | | - | Late Roman | |
| Leonius | | - | Late Roman | |
| Leontina | | - | Italian, Late Roman | |
| Liana | | - | Italian, Portuguese, Romanian, English | |
| Liber | | LIE-bər (English) | Roman Mythology | |
| Liberia | | - | Late Roman | |
| Liberius | | - | Late Roman | |
| Libitina | | - | Roman Mythology | |
| Liborius | | - | Late Roman | |
| Lidia | | LEED-yah (Polish), LEE-dyah (Italian), LEE-dhyah (Spanish) | Polish, Italian, Spanish, Romanian | |
| Liliana | | lee-LYAH-nah (Italian, Polish), lil-ee-AN-ə (English) | Italian, Spanish, Portuguese, Romanian, Polish, English | |
| Livia (1) | | LEE-vyah (Italian) | Italian, Romanian, Ancient Roman | |
| Liviana | | lee-VYAH-nah (Italian) | Italian, Ancient Roman | |
| Livianus | | - | Ancient Roman | |
| Liviu | | - | Romanian | |