| Leon | | LEE-awn (English), LE-awn (German, Polish) | English, German, Polish, Slovene, Croatian, Dutch, Ancient Greek | |
| Leonard | | LEN-ərd (English), LAY-o-nahrt (Dutch) | English, Dutch, German, Ancient Germanic | |
| Leonidas | | - | Greek, Ancient Greek | |
| Leontios | | - | Ancient Greek | |
| Leontius | | - | Ancient Greek (Latinized) | |
| Leudagar | | - | Ancient Germanic | |
| Leudbald | | - | Ancient Germanic | |
| Leudoberct | | - | Ancient Germanic | |
| Leutgard | | - | Ancient Germanic | |
| Leuthar | | - | Ancient Germanic | |
| Leutwin | | - | Ancient Germanic | |
| Ligeia | | - | Greek Mythology, Ancient Greek | |
| Linos | | - | Greek Mythology, Ancient Greek | |
| Linus | | LIE-nəs (English), LEE-nuws (German, Swedish) | Greek Mythology (Latinized), Ancient Greek (Latinized), German, Swedish, Norwegian, Danish | |
| Linza | | - | Ancient Germanic | |