Surname List: Begins with O
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All surnames beginning with O, sorted alphabetically (total individuals):
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1. O'Braenain (2) 2. O'Brien (4) 3. O'Caellaide (2) 4. O'Cahan (1) 5. O'Caillaide (1) 6. O'Cathain (1) 7. O'Cathan (13) 8. O'Cheinnselaig (13) 9. O'Chorb (3) 10. O'Connor (3) 11. O'Domnail (2) 12. O'Duibne (13) 13. O'Dunlainge (2) 14. O'Faelain (4) 15. O'Gairbita (2) 16. O'Hara (1) 17. O'Keefe (5) |
18. O'Morda (7) 19. O'Muiredaig (7) 20. O'Neal (1) 21. O'Neill (59) 22. O'Neils (1) 23. O'Nuallain (4) 24. O'Ruarc (2) 25. O'Thairmeascain (1) 26. O'Toole (7) 27. Oakes (1) 28. Oates (3) 29. Obotrites (2) 30. Ocland (1) 31. Octavia (1) 32. Octavius (4) 33. Oda (1) 34. Odacre (1) |
35. Odgen (1) 36. Ogden (2) 37. Ogilvie (3) 38. Ogilvy (5) 39. Ogive (1) 40. Olaf (1) 41. Olafsdatter (2) 42. Olafsdotter (1) 43. Olafsson (15) 44. Olar (2) 45. Old (1) 46. Olifard (8) 47. Olioll (1) 48. Oliphant (15) 49. Oliver (3) 50. Olmuchaidh (1) 51. Olof (1) |
52. Olsen (2) 53. Omdal (1) 54. Onfror (1) 55. Ontwine (1) 56. Onundsson (1) 57. Opie (1) 58. Orange (1) 59. Orboda (1) 60. Ord (95) 61. Orde (1) 62. Orefice (1) 63. Organ (13) 64. Orgill (1) 65. Oriole (1) 66. Orkney (2) 67. Orleans (9) 68. Ormes (5) |
69. Ormiston (1) 70. Orr (12) 71. Orser (1) 72. Orton (1) 73. Osborne (2) 74. Ossary (1) 75. Osterman (1) 76. Ostrander (2) 77. Ostrum (1) 78. Ots-Toch (1) 79. Ottarsson (1) 80. Otten (2) 81. Outhwaite (1) 82. Owain (7) 83. Owen (5) 84. Owens (1) |