| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 441 | Luthais | Scottish | Famous warrior. | M | |
| 442 | Lyall | Scottish | Surname meaning loyal. | M | |
| 443 | Lydell | Scottish | A surname often used as a given name. | M | |
| 444 | Lyel | Scottish | Surname meaning loyal. | M | |
| 445 | Lynsey | 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 | |
| 446 | Mac | Scottish | Son of. | M | |
| 447 | MacAdhamh | Scottish | Son of Adam. | M | |
| 448 | MacAlister | Scottish | Son of Alasdair. | M | |
| 449 | MacAlpin | Scottish | Son of Alpine. | M | |
| 450 | MacAlpine | Scottish | Son of Alpine. | M | |
| 451 | MacAndrew | Scottish | Son of Andrew. | M | |
| 452 | MacArthur | Scottish | Son of Arthur. | M | |
| 453 | MacAulay | Scottish | Son of Olaf. | M | |
| 454 | MacAuslan | Scottish | Son of Absalon. | M | |
| 455 | MacBain | Scottish | Son of Beathan. | M | |
| 456 | MacBean | Scottish | Son of Beathan. | M | |
| 457 | MacBeth | Scottish | Son of Beth. | M | |
| 458 | MacCallum | Scottish | Son of Callum. | M | |
| 459 | MacClennan | Scottish | Son of Finnian's servant. | M | |
| 460 | MacColl | Scottish | Son of Coll. | M | |