Most Common Surnames in Leinster

Here are the 100 most common surnames in Leinster for the 1901 census. Numbers in brackets represent the total number of people with this surname with regard to this province.

1. Byrne (22669)

2. Murphy (20216)

3. Kelly (16317)

4. Doyle (15686)

5. Walsh (10268)

6. Dunne (9290)

7. Reilly (8265)

8. Farrell (7912)

9. Nolan (7854)

10. Ryan (7768)

11. Kavanagh (6934)

12. Brennan (6849)

13. Carroll (6465)

14. Murray (5823)

15. Smith (5164)

16. Whelan (5121)

17. Moore (5008)

18. Smyth (4896)

19. Lynch (4675)

20. Kennedy (4609)

21. Cullen (4546)

22. Daly (4392)

23. Kenny (4328)

24. Brien (4306)

25. Fitzpatrick (4306)

26. Connor (4096)

27. Quinn (4050)

28. Brady (4039)

29. Clarke (3970)

30. Hughes (3607)

31. Maher (3564)

32. Moran (3321)

33. Martin (3313)

34. White (3298)

35. Flynn (3264)

36. Redmond (3251)

37. Duffy (3227)

38. Dowling (3093)

39. Mooney (3026)

40. Phelan (3016)

41. Burke (3008)

42. Power (2984)

43. Delaney (2954)

44. Connolly (2903)

45. Neill (2757)

46. Roche (2741)

47. Butler (2705)

48. Keogh (2692)

49. Ward (2690)

50. Kinsella (2628)

51. Molloy (2614)

52. OBrien (2593)

53. Dempsey (2582)

54. Maguire (2540)

55. Egan (2519)

56. Fox (2514)

57. Donnelly (2513)

58. Malone (2503)

59. Kehoe (2419)

60. Fitzgerald (2305)

61. Doran (2290)

62. Flanagan (2224)

63. Healy (2220)

64. Donohoe (2184)

65. Lawlor (2170)

66. Gorman (2146)

67. Keegan (2127)

68. Hogan (2125)

69. Sheridan (2110)

70. Foley (2072)

71. Kearney (2063)

72. Collins (2036)

73. Mahon (2019)

74. Browne (2002)

75. Cahill (2000)

76. Casey (1990)

77. Wilson (1967)

78. Breen (1964)

79. Flood (1960)

80. Furlong (1959)

81. ONeill (1944)

82. Jones (1935)

83. Brown (1922)

84. Connell (1913)

85. Rourke (1863)

86. King (1860)

87. Campbell (1859)

88. Hickey (1852)

89. Mc Donald (1850)

90. Corcoran (1841)

91. Curran (1832)

92. Bolger (1808)

93. Conroy (1793)

94. Sullivan (1768)

95. Fagan (1760)

96. Lennon (1760)

97. Cleary (1732)

98. Kane (1730)

99. Hayes (1728)

100. O’Neill (1705)