| Liupold | | - | Ancient Germanic | |
| Lothar | | LO-tahr (German) | German, Ancient Germanic | |
| Loukianos | | - | Ancient Greek | |
| Ludolf | | LOO-dawlf (German) | German, Dutch, Ancient Germanic | |
| Ludovicus | | - | Ancient Germanic (Latinized) | |
| Luitgard | | - | German, Ancient Germanic | |
| Lutgardis | | - | Ancient Germanic (Latinized) | |
| Lycurgus | | - | Greek Mythology (Latinized), Ancient Greek (Latinized) | |
| Lycus | | - | Greek Mythology (Latinized), Ancient Greek (Latinized) | |
| Lykos | | - | Greek Mythology, Ancient Greek | |
| Lykourgos | | - | Greek Mythology, Ancient Greek | |
| Lysander | | - | Ancient Greek (Latinized) | |
| Lysandra | | - | Ancient Greek | |
| Lysandros | | - | Ancient Greek | |
| Lysimachos | | - | Ancient Greek | |