Surname List: Begins with O


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All surnames beginning with O, sorted alphabetically (total individuals):

1. O'Brien (13)
2. O'Connell (19)
3. O'Connor (10)
4. O'Gorman (1)
5. O'Grady (2)
6. O'Keefe (1)
7. O'Keeffe (1)
8. O'Key (1)
9. O'Leary (2)
10. O'neal (1)
11. O'Neil (2)
12. O'Neill (14)
13. O'Reilly (2)
14. O'Shea (1)
15. O'Sullivan (2)
16. O'Toole (2)
17. O?Toole (1)
18. Oady (1)
19. Oak (1)
20. Oake (1)
21. Oakey (1)
22. Oakley (25)
23. Oaks (2)
24. Oates (12)
   25. Oatis (1)
26. Oatley (14)
27. Oatway (2)
28. Obern (3)
29. Oberzanek (1)
30. Oborn (13)
31. Obron (1)
32. Ockey (2)
33. Oddy (26)
34. Odell (31)
35. Odgers (7)
36. Oedingen (1)
37. of Castile (1)
38. of Germany (1)
39. Offer (7)
40. Offord (5)
41. Offutt (1)
42. Ogden (13)
43. Ogilvie (13)
44. Ogilvy (2)
45. Ogley (1)
46. Ohlson (10)
47. Olafsdatter (1)
48. Old (10)
   49. Olden (1)
50. Oldfield (5)
51. Oldham (2)
52. Olding (9)
53. Oldland (57)
54. Oldrey (1)
55. Oldring (6)
56. Oler (1)
57. Olesdatter (1)
58. Olfsson (1)
59. Oliver (134)
60. Olsen (3)
61. Olson (2)
62. Olsson (4)
63. Onions (11)
64. Onslow (2)
65. Oppenheimer (4)
66. Oram (42)
67. Orange (1)
68. Orchard (24)
69. Ordner (1)
70. Orford (1)
71. Orledge (1)
72. Orman (7)
   73. Orme (33)
74. Ormond (1)
75. Ormsby (3)
76. Orr (1)
77. Ortlip (1)
78. Orton (4)
79. Ory (1)
80. Osborn (9)
81. Osborne (37)
82. Osell (1)
83. Osland (1)
84. Osmen (1)
85. Osment (15)
86. Osmond (4)
87. Ossub (1)
88. Osterhout (1)
89. Ostime (1)
90. Ostle (1)
91. Ostlife (2)
92. Ostlund (1)
93. Oswin (3)
94. Otes (3)
95. Otter (29)
96. Ottersen (2)
   97. Otto (2)
98. Oughten (1)
99. Oughton (1)
100. Outlaw (11)
101. Outram (1)
102. Outrim (1)
103. Ovenden (2)
104. Overend (1)
105. Overson (1)
106. Overton (2)
107. Overy (1)
108. Owen (94)
109. Owens (91)
110. Owers (10)
111. Owsin (1)
112. Oxborow (1)
113. Oxborrow (36)
114. Oxbury (1)
115. Oxland (1)
116. Oxley (4)
117. Ozzard (3)