| Luitpold | | - | German | |
| Luiz | | - | Portuguese (Brazilian) | |
| Luiza | | luw-EE-zah (Polish) | Polish, Portuguese, Romanian | |
| Lujza | | - | Hungarian | |
| LukÁCs | | LOO-kawch | Hungarian | |
| Luka | | - | Russian, Serbian, Croatian, Slovene, Macedonian, Georgian, Old Church Slavic | |
| Lukas | | LOO-kahs (German) | German, Swedish, Norwegian, Danish, Lithuanian | |
| Luksa | | LOOK-sah | Esperanto | |
| Lule | | - | Albanian | |
| Luljeta | | - | Albanian | |
| Lulu (1) | | LOO-loo | German | |
| LuminiȚA | | loo-mee-NEE-tsah | Romanian | |
| Lumusi | | - | Western African, Ewe | |
| Luna | | - | Roman Mythology | |
| Luned | | LIN-ed (Welsh) | Welsh, Welsh Mythology, Arthurian Romance | |