Gaelic Last Names and Meanings

The Gaelic people have a very interesting history, and it’s worth learning more about. This is especially true if you have Gaelic roots. Some of the Irish and Scottish peoples and clans are Gaelic descendants as well, meaning that the cultural impact is widely spread throughout the UK, and also, the world.

Below is a list of Gaelic surnames that are still widely used throughout Ireland. We will also talk about how some of these names came to be.

Gaelic Culture & Naming History

A big part of Gaelic last names in modern days is that they are anglicized. The Norman Invasion was the main reason for this. Many Gaelic first names and last names were changed to make them sound more English. 

This was also true for the Scottish settlers in Ireland. Here are some examples: O’Murchadha is the original Gaelic version of the last name Murphy, and O’Laoghaire is the original Gaelic version of O’Leary. 

Many names, like O’Connor, kept the “O” while other names, like Kelly, dropped it altogether, and it remained that way. Places like Munster, Galway, and Giolla are where you will see many Gaelic names that have turned into anglicized Irish names. These surnames were also patronymic to the child’s grandfather, which is why many of them translate to “descendant of.”

Popular Gaelic Surnames

Gaelic names often honor respected ancestors. Reading or hearing these names can feel like connecting to the personality and charm of long-ago relatives.  

1. Barry - Fair-haired
2. Boyle - Rash pledge
3. Brady - Spirited
4. Brennan - Descendant of Braonán
5. Buckley - Bleak hill
6. Burke - From Burgh
7. Byrne - Descendant of Bran
8. Campbell - Crooked mouth
9. Carroll - Fierce in battle
10. Casey - Descendant of Cathasach
11. Clarke - Clerk
12. Collins - Descendant of Coileáin
13. Cunningham - Descendant of Cuinneagán
14. Daly - Assembly
15. Doyle - Descendant of Dubhghaill
16. Duffy - Descendant of Dubthach
17. Dunne - Dark or brown
18. Farrell - Descendant of Fearghal
19. Fitzgerald - Son of Gerald
20. Fitzpatrick - Son of Patrick
21. Flanagan - Red or ruddy
22. Flynn - Descendant of Flann
23. Foley - Plunderer
24. Gallagher - Descendant of Gallchobha
25. Hayes - Descendant of Aodh
26. Hogan - Young man or warrior
27. Hughes - Son of Hugh
28. Kelly - Descendant of Ceallach
29. Kennedy - Descendant of Ceannéidigh
30. Lyons - Grey
31. McCarthy - Loving person
32. Moore - Noble
33. Murphy - Descendant of Murchadh, sea warrior
34. Murray - Sea settlement
35. Nolan - Descendant of Nuallán
36. O’Brien - Descendant of Brian or O’Briain
37. O’Connell - Descendant of Conall
38. O’Connor - Descendant of Conchobar, lover of wolves
39. O’Doherty - Descendant of Dochartach
40. O’Donnell - Descendant of Donal or Domhnall
41. O’Leary - Descendant of Laoghaire, keeper of the calves
42. O’Niall - Descendant of Niall
43. O’Reilly - Descendant of Raghaillach
44. O’Sullivan - Descendant of Súileabháin
45. Quinn - Descendant of Conn
46. Ryan - Little king
47. Sheehan - Descendant of Síodhachán
48. Smith - Metalworker
49. Thompson - Descendant of Thom
50. Walsh - Welshman

Common Gaelic Last Names

These names often reflect powerful clans and historic lineages that shaped the heart of Gaelic culture. Perfect for families connected to their roots or drawn to the strength of tradition and their genealogical puzzles!

1. Brody - Ditch or muddy place
2. Callaghan - Bright-headed
3. Connolly - Descendant of Conghalach, valiant or high will
4. Cullen - Holly tree
5. Donovan - Descendant of Donnabhán, brown-haired warrior
6. Gowan - Smith or metalworker
7. Keenan - Descendant of Cian, ancient
8. Lennox - Elm grove
9. MacCarthy - Son of Carthy, loving
10. MacDonald - Son of Donald, world ruler
11. MacDowell - Dark stranger
12. MacFarlane - Son of Bartholomew
13. MacGregor - Son of Gregor, watchful or vigilant
14. MacIntyre - Carpenter or wright
15. MacKenzie - Son of Kenneth, handsome
16. MacLeod - Son of Leòd, gray-haired or ugly
17. MacNab - Son of the abbot
18. MacRae - Son of grace
19. Maher - Kind or generous
20. O’Farrell - Descendant of Fearghal, man of valor

Unique Gaelic Surnames 

And if you're looking for some more uncommon and interesting last names in the Gaelic language, check out the following ones! 

1. Ahearn - Lord of horses
2. Blake - Dark or fair (origin-dependent)
3. Carey - Descendant of Ciardha or dark
4. Darcy - Dark one
5. Grady - Descendant of Gráda, noble, or illustrious
6. Keane - Descendant of Cathán or battle
7. Kavanagh - Handsome or comely
8. O’Neill - Descendant of Niall, champion, or cloud
9. Reid - Red-haired or ruddy-complexioned
10. Rowan - Little red one or inspired by the rowan tree
11. Sweeney - Pleasant or well-disposed

Famous Gaelic Last Names and Meanings

Finally, here are some famous Gaelic surnames and the people who held them, from historic figures to those in the arts.

1. Flanagan - Reddish or ruddy; like Richard Flanagan, author of The Narrow Road to the Deep North
2. Kennedy - Helmeted chief; President John F. Kennedy was an iconic U.S. leader
3. MacGregor - Son of Gregor; such as Rob Roy MacGregor, the famed Scottish folk hero
4. MacLeod - Son of Leod; from Clan MacLeod, tied to the Hebridean Isles and Dunvegan Castle
5. O’Sullivan - Dark-eyed; after Alexander Sullivan, Irish-American activist

Getting the Gist of Gaelic Surnames

Gaelic surnames are rich in culture, history and meaning. They have survived for centuries and continue to be passed down from generation to generation. These surnames tell a story of the people who carried them, their ancestors and the places they came from.

Still looking for more? Continue exploring the dazzling world of Gaelic names by combining these traditions with personal meaning—it’s all part of honoring past generations while creating something uniquely yours!

For more information check out these popular topics:

• Irish Last Names and Meanings
• Scottish Last Names and Meanings
• Welsh Last Names and Meanings

Do you have any parenting questions for our parenting coach and expert, Dr. Ana Aznar? Ask for free today!