| LIÙSAIDH f Scottish |
| LLEUCU f Welsh |
| LLÚCIA f Catalan |
| LOUKIANOS m Ancient Greek |
| LUCA (2) f Hungarian, Croatian |
| LUCE f Italian, French |
| LUCETTA f English |
| LUCETTE f French |
| LÚCIA f Portuguese |
| LUCÍA f Spanish |
| LUCIA f Italian, German, English, Swedish, Norwegian, Danish, Romanian, Slovak, Ancient Roman |
| LUCIAN m Romanian, English |
| LUCIANA f Italian, Spanish, Portuguese, Ancient Roman |
| LUCIANO m Italian, Spanish, Portuguese |
| LUCIANUS m Ancient Roman |
| LUCIE f French, Czech |
| LUCIEN m French |
| LUCIENNE f French |
| LUCIJA f Slovene, Croatian |
| LUCIJAN m Croatian |
| LUCILA f Spanish |
| LUCILE f French, English |
| LUCÍLIA f Portuguese |
| LUCILIA f Ancient Roman |
| LUCILIO m Italian |
| LUCILIUS m Ancient Roman |
| LUCILLA f Italian, Ancient Roman |
| LUCILLE f French, English |
| LUCINDA f English, Portuguese, Literature |
| LUCINDE f French |
| LÚCIO m Portuguese |
| LUCIO m Italian, Spanish |
| LUCIUS m Ancient Roman, Biblical, English |
| ŁUCJA f Polish |
| LUCJA f Polish |
| ŁUCJAN m Polish |
| LUCJAN m Polish |
| LUCJUSZ m Polish |
| LUCY f English |
| LUCYNA f Polish |
| LUKEN m Basque |
| LUUS f Dutch, Limburgish |
| LUZIA f Portuguese, German |
