| Lucas | | LOO-kəs (English), LUY-kahs (Dutch), luy-KAH (French), LOO-kəsh (Portuguese), LOO-kahs (Spanish) | English, Dutch, French, Portuguese, Spanish, Biblical Latin | |
| Luce | | LOO-che (Italian), LOOS (French) | Italian, French | |
| Lucette | | - | French | |
| 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 | |
| Lucie | | luy-SEE (French), luw-TSI-e (Czech) | French, Czech | |
| Lucien | | - | French | |
| Lucienne | | luy-SYEN | French | |
| Lucifer | | LOO-si-fər (English) | Judeo-Christian Legend | |
| Lucija | | - | Slovene, Croatian | |
| Lucijan | | - | Croatian | |
| Lucile | | loo-SEEL | French, English | |
| Lucilia | | - | Ancient Roman | |
| Lucilius | | - | Ancient Roman | |