| Lacey | | LAY-see | English | |
| Lachlan | | - | Scottish, English (Australian) | |
| Laci (2) | | LAY-see | English | |
| Lacy | | LAY-see | English | |
| Laila (1) | | LAY-lə (English), LIE-lə (English) | Arabic, English | |
| Lainey | | LAYN-ee | English (Modern) | |
| Laird | | - | English (Rare) | |
| Lake | | LAYK | English (Rare) | |
| Lalia | | - | English (Rare) | |
| Lallie | | LAL-ee | English (Rare) | |
| Lally | | LAL-ee | English (Rare) | |
| Lamar | | lə-MAHR | English, African American | |
| Lambert | | LAHM-bert (German), LAHM-bərt (Dutch), lam-BER (French), LAM-bərt (English) | German, Dutch, French, English, Ancient Germanic | |
| Lamont | | - | English | |
| Lana | | LAH-nə (English) | English, Russian, Croatian, Serbian | |