| Lucinda | | loo-SIN-də (English) | English, Portuguese, Literature | |
| Lucine | | - | Armenian | |
| Lucineh | | - | Armenian | |
| Lucio | | LOO-cho (Italian) | Italian, Spanish | |
| Lucius | | LOO:-ki-uws (Ancient Roman), LOO-shəs (English), LOO-see-əs (English) | Ancient Roman, Biblical, English | |
| Lucky | | LUK-ee (English) | English, Indian, Hindi | |
| Lucretia | | - | Ancient Roman, Roman Mythology | |
| Lucretius | | - | Ancient Roman | |
| Lucrezia | | loo-KRE-tsyah | Italian | |
| Ludger | | LUD-gər (Dutch) | German, Dutch | |
| Ludis | | - | Latvian | |
| Ludmila | | - | Czech, Russian | |
| Ludmilla | | - | Russian, Bulgarian | |
| Ludolf | | LOO-dawlf (German) | German, Dutch, Ancient Germanic | |
| Ludovica | | loo-do-VEE-kah | Italian | |