| Justus | | YUWS-tuws (German), JUS-təs (English) | German, Dutch, Late Roman | |
| Katerina | | - | Macedonian, Russian, Bulgarian, Greek, Late Roman | |
| Laetitia | | - | Late Roman, French | |
| Laurus | | - | Late Roman | |
| Leo | | LE-o (German, Finnish), LAY-o (Dutch), LEE-o (English) | German, Dutch, Swedish, Norwegian, Danish, Finnish, English, Croatian, Late Roman | |
| Leocadia | | - | Spanish, Late Roman | |
| Leocadius | | - | Late Roman | |
| Leonia | | - | Late Roman | |
| Leonius | | - | Late Roman | |
| Leontina | | - | Italian, Late Roman | |
| Liberia | | - | Late Roman | |
| Liberius | | - | Late Roman | |
| Liborius | | - | Late Roman | |
| Lupus | | - | Late Roman | |
| Magnus | | MAHNG-nus (Swedish), MAG-nəs (English) | Swedish, Norwegian, Danish, Late Roman | |