The 100 Most Common Names Found IN Ireland

From the site IRISH MANES
... The Origin of Irish Family Names, a list of the 100 most common names found in Ireland and their meanings

These details were compiled from the 1890 Matheson report

Rank - Name - Gaelic Equivalent - Meaning

1 Murphy - ó Murchadha - sea-battler

2 Kelly - ó Ceallaigh - bright-headed

3 O'Sullivan - ó Súilleabháin - dark-eyed

4 Walsh - Breathnach - Welshman

5 Smith - Mac Gabhann - son of the smith

6 O'Brien - ó Briain - high, noble

7 Byrne - ó Broin - a raven

8 Ryan - ó Maoilriain - king

9 O'Connor - ó Conchobhair - patron of warriors

10 O'Neill - ó Néill - from Niall of the Nine Hostages

11 O'Reilly - ó Raghallaigh

12 Doyle - ó Dubhghaill - dark foreigner

13 McCarthy - Mac Carthaigh - loving person

14 Gallagher - ó Gallchobhair - lover of foreigners

15 O'Doherty - ó Dochartaigh - hurtful

16 Kennedy - ó Cinnéide - helmet headed

17 Lynch - ó Loinsigh - seafarer, exile

18 Murray - ó Muireadhaigh - lord, master

19 Quinn - ó Cuinn - wisdom, chief

20 Moore - ó Mordha - majestic

21 McLoughlin - Mac Lochlainn - viking

22 O'Carroll - ó Cearbhaill - valorous in battle

23 Connolly - ó Conghaile - fierce as a hound

24 Daly - ó Dálaigh - assembles frequently

25 O'Connell - ó Conaill - strong as a wolf

26 Wilson - Mac Liam - son of William

27 Dunne - ó Duinn brown

28 Brennan - ó Braonáin - sorrow

29 Burke - de Búrca - from Richard de Burgh

30 Collins - ó Coileáin - young warrior

31 Campbell - crooked mouth

32 Clarke - óCléirigh - clergyman

33 Johnston - Mac Seáin - son of John

34 Hughes - ó hAodha - fire

35 O'Farrell - ó Fearghail - man of valour

36 Fitzgerald - Mac Gearailt - spear rule

37 Brown - Mac an Bhreithiún - son of the brehon (judge)

38 Martin - Mac Giolla Mháirtín - devotee of Saint Martin

39 Maguire - Mag Uidhir - dun-coloured

40 Nolan - ó Nualláin - famous

41 Flynn - ó Floinn - bright red

42 Thompson - Mac Tomáis - son of Thom

43 O'Callaghan - ó Ceallacháin - bright headed

44 O'Donnell - ó Domhnaill - world-mighty

45 Duffy - ó Dufaigh - dark, black

46 O'Mahony - ó Mathúna - bear-calf

47 Boyle - ó Baoill - vain pledge

48 Healy - ó hÉalaighthe - artistic, scientific

49 O'Shea - ó Séaghdha - fine, stately

50 White - Mac Giolla Bháin - of fair complexion

51 Sweeney - Mac Suibhne - pleasant

52 Hayes - ó hAodha - fire

53 Kavanagh Caomhánach comely, mild

54 Power - de Paor - the poor man

55 McGrath - Mac Craith - son of grace

56 Moran - ó Móráin - great

57 Brady - Mac Brádaigh - spirited

58 Stewart - Stiobhard - one who superintends

59 Casey - ó Cathasaigh - vigilant in war, watchful

60 Foley - ó Foghladh - a plunderer

61 Fitzpatrick - Mac Giolla Phádraig - devotee of Saint Patrick

62 O'Leary - ó Laoghaire - calf-herd

63 McDonnell - Mac Domhnaill - world-mighty

64 MacMahon - Mac Mathúna - bear-calf

65 Donnelly - ó Donnghaile - brown valour

66 Regan - ó Riagáin - little king

67 Donovan - ó Donnabháin - brown, black

68 Burns - from Scottish Burness

69 Flanagan - ó Flannagáin - red, ruddy

70 Mullan - ó Maoláin - bald

71 Barry - de Barra - Cambro-Norman name

72 Kane - ó Catháin - battler

73 Robinson - son of Robert

74 Cunningham - Scottish name

75 Griffin - ó Gríofa - Welsh: Gruffudd

76 Kenny - ó Cionaoith - fire sprung

77 Sheehan - O'Siodhachain - peaceful

78 Ward - Mac an Bhaird - son of the bard

79 Whelan - ó Faoláin - wolf

80 Lyons - ó Laighin - grey

81 Reid - red haired, ruddy complexion

82 Graham - grey home

83 Higgins - ó hUiginn

84 Cullen - ó Cuilinn - holly

85 Keane - Mac Catháin

86 King - ó Cionga

87 Maher - Meagher - fine, majestic

88 MacKenna - Mac Cionaoith - fire-sprung

89 Bell - Mac Giolla Mhaoil

90 Scott - a Scottish gael

91 Hogan - ó hÓgáin - young

92 O'Keeffe - ó Caoimh - gentle

93 Magee - Mag Aoidh - fire

94 MacNamara - Mac Conmara - hound of the sea

95 MacDonald - Mac Dónaill - world-mighty

96 MacDermott - Mac Diarmada - free from jealousy

97 Molony - ó Maolomhnaigh - servant of the Church

98 O'Rourke - ó Ruairc

99 Buckley - ó Buachalla - cow herd

100 O'Dwyer - ó Dubhuir - black