| Lucas | | LOO-kəs (English), LUY-kahs (Dutch), luy-KAH (French), LOO-kəsh (Portuguese), LOO-kahs (Spanish) | English, Dutch, French, Portuguese, Spanish, Biblical Latin | |
| Lucho | | - | Spanish | |
| Luciana | | loo-CHAH-nah (Italian), loo-THYAH-nah (Spanish), loo-SYAH-nah (Latin American Spanish) | Italian, Spanish, Portuguese, Ancient Roman | |
| Luciano | | loo-CHAH-no (Italian), loo-THYAH-no (Spanish), loo-SYAH-no (Latin American Spanish) | Italian, Spanish, Portuguese | |
| Lucila | | - | Spanish | |
| Lucio | | LOO-cho (Italian) | Italian, Spanish | |
| Luis | | LWEES | Spanish | |
| Luisa | | LWEE-sah (Spanish), LWEE-zah (Italian) | Spanish, Italian | |
| Luisina | | lwee-SEE-nah | Spanish | |
| Luisita | | lwee-SEE-tah | Spanish | |
| Lupe | | LOO-pe | Spanish | |
| Lupita | | loo-PEE-tah | Spanish | |
| Luz | | LOOTH (Spanish), LOOS (Latin American Spanish) | Spanish | |