Cognoms nord-irlandesos amb o

  1. o'neill (8092)
  2. o'kane (5879)
  3. o'hagan (3280)
  4. orr (2437)
  5. o'connor (2028)
  6. o'donnell (2013)
  7. o'hare (2009)
  8. o'hara (1888)
  9. o'reilly (1819)
  10. o'brien (1685)
  11. owens (1412)
  12. o'hanlon (1318)
  13. oneill (1063)
  14. o'boyle (719)
  15. oliver (661)
  16. o'rourke (614)
  17. osborne (602)
  18. o'callaghan (579)
  19. o'sullivan (475)
  20. okane (467)
  21. o'connell (430)
  22. o'loughlin (412)
  23. ogle (304)
  24. o'toole (284)
  25. owen (254)
  26. ohare (245)
  27. ohara (241)
  28. ohagan (225)
  29. o'halloran (206)
  30. o'keefe (199)
  31. o'grady (187)
  32. o'gorman (184)
  33. oconnor (183)
  34. o'neil (180)
  35. obrien (175)
  36. odonnell (174)
  37. o'malley (168)
  38. ogilby (162)
  39. o'shea (160)
  40. oakes (155)
  41. o'donoghue (143)
  42. overend (137)
  43. o'dowd (132)
  44. o'leary (122)
  45. oreilly (108)
  46. o'carroll (104)
  47. ohanlon (99)
  48. odoherty (97)
  49. o'flaherty (91)
  50. officer (90)
  51. oneil (85)
  52. o'farrell (79)
  53. o'driscoll (73)
  54. ogilvie (70)
  55. orme (63)
  56. o'keeffe (56)
  57. o'donovan (56)
  58. o'higgins (53)
  59. otterson (53)
  60. oldham (51)
  61. o'regan (50)
  62. oliveira (50)
  63. oakley (50)
  64. orourke (48)
  65. oboyle (47)
  66. o (44)
  67. oliphant (42)
  68. o reilly (42)
  69. o'shaughnessy (41)
  70. ormsby (41)
  71. o'kelly (39)
  72. o'riordan (39)
  73. oconnell (37)
  74. o neill (37)
  75. ormerod (36)
  76. o'brian (35)
  77. oates (33)
  78. o'dwyer (32)
  79. o'flynn (32)
  80. ochiltree (32)
  81. ocallaghan (31)
  82. overton (30)
  83. o'rorke (29)
  84. osman (29)
  85. o'mahony (28)
  86. osbourne (28)
  87. o'dea (27)
  88. ogara (26)
  89. o donnell (26)
  90. osullivan (25)
  91. o'rielly (25)
  92. o connor (25)
  93. orman (24)
  94. oloughlin (24)
  95. o'conor (23)
  96. oldroyd (22)
  97. o'gormley (21)
  98. ovens (21)
  99. ohalloran (20)
  100. oladipupo (20)