| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 501 | Mac Bhriain | Gaelic | Son of the strong. | M | |
| 502 | Mac Daraich | Gaelic | Son of the man from the ford by the oak trees. | M | |
| 503 | Mac GhiIle Easpuig | Gaelic | Son of the one who serves the sacred one. | M | |
| 504 | Mac Ghille Aindrei | Gaelic | Son of the one who served the manly one. | M | |
| 505 | Mac Ghille Bhuidhe | Gaelic | Son of the one who serves the blond one. | M | |
| 506 | Mac Ghille Dhuibh | Gaelic | Son of the one who serves the dark man. | M | |
| 507 | Mac Ghille Dhuinn | Gaelic | Son of the one who serves Brown. | M | |
| 508 | Mac Ghille Laider | Gaelic | Son of the one who serves the strong armed one. | M | |
| 509 | Mac Ghille Mhichei | Gaelic | Son of the one who served Saint Michael. | M | |
| 510 | Mac Nair | Gaelic | Son of an heir. | M | |
| 511 | MacAdam | Gaelic | Son of Adam. | M | |
| 512 | MacAdhaimh | Gaelic | Son of Adam. | M | |
| 513 | MacAilean | Gaelic | Son of the handsome man. | M | |
| 514 | MacAladair | Gaelic | Son of Alasdair. | M | |
| 515 | MacAllen | Gaelic | Son of the handsome man. | M | |
| 516 | MacAllister | Gaelic | Son of Alasdair. | M | |
| 517 | MacArthur | Gaelic | Son of Arthur. | M | |
| 518 | MacArtuir | Gaelic | Son of Arthur. | M | |
| 519 | MacLean | Gaelic | Son of the handsome man. | M | |
| 520 | MacNab | Gaelic | Son of the Father or Abbott. | M | |