| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 421 | Lean | Scottish | Serves John. | M | |
| 422 | Leane | Scottish | Serves John. | M | |
| 423 | Leathan | Scottish | River. | M | |
| 424 | Leith | Scottish | River. | M | |
| 425 | Lennox | Scottish | Surname and clan name. Lennox; a Scottish nobleman; appears in Shakespeare's Macbeth. | M | |
| 426 | Leod | Scottish | Ugly. | M | |
| 427 | Les | Scottish | Diminutive of Leslie: Scottish surname and place name. From Leslie. | M | |
| 428 | Leslie | Scottish | Scottish surname and place name. From Leslie. | M | |
| 429 | Lindsay | Scottish | From the island of the lime tree. Although in the past, Lindsay was a common boys' name, today it is used more often for girls. | M | |
| 430 | Lindsey | Scottish | Variant of Lindsay: From the island of the lime tree. Although in the past, Lindsay was a common boys' name, today it is used more often for girls. | M | |
| 431 | Livingstone | Scottish | From Livingston. | M | |
| 432 | Logan | Scottish | Finnian's servant. | M | |
| 433 | Logen | Scottish | Low meadow. | M | |
| 434 | Lorn | Scottish | Variant of Lorne: The name of an early Scottish chieftain and a place name. Famous Bearer: Canadian actor Lorne Green (1959-1971). | M | |
| 435 | Lorne | Scottish | The name of an early Scottish chieftain and a place name. Famous Bearer: Canadian actor Lorne Green (1959-1971). | M | |
| 436 | Lornell | Scottish | Form of Lawrence. | M | |
| 437 | Ludo | Scottish | Diminutive of Ludovic: Derived from the Latinized form of the name Louis. | M | |
| 438 | Ludovic | Scottish | Derived from the Latinized form of the name Louis. | M | |
| 439 | Lundie | Scottish | From the island grove. | M | |
| 440 | Lundy | Scottish | From the island grove. | M | |