| Lachlan | Man | Scottish Names |
| Laird | Man | Scottish Names |
| Lassie | Woman | Scottish Names |
| Lennox | Unisex | Scottish Names |
| Leven | Unisex | Scottish Names |
| Lilias | Woman | Scottish Names |
| Livingston | Man | Scottish Names |
| Lochellen | Woman | Scottish Names |
| Logan | Unisex | Scottish Names |
| Lorna | Woman | Scottish Names |
| Lowry | Man | Scottish Names |