| LuÍSeach | | - | Irish | |
| Luana | | loo-AN-ə (English), loo-AH-nah (Italian) | English, Italian, Portuguese | |
| Luann | | loo-AN | English | |
| Luanna | | loo-AN-ə | English (Rare) | |
| Luanne | | loo-AN | English | |
| Luba | | - | Russian, Ukrainian | |
| Lubbert | | - | Frisian | |
| Lubomierz | | luw-BAWM-yesh | Polish (Rare) | |
| LucÍA | | loo-THEE-ah (Spanish), loo-SEE-ah (Latin American Spanish) | Spanish | |
| LucÍLia | | - | Portuguese | |
| Lucan | | - | History | |
| Lucas | | LOO-kəs (English), LUY-kahs (Dutch), luy-KAH (French), LOO-kəsh (Portuguese), LOO-kahs (Spanish) | English, Dutch, French, Portuguese, Spanish, Biblical Latin | |
| Lucetta | | - | English | |
| Lucho | | - | Spanish | |
| 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 | |