Surname List: Begins with O


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

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1. O'Boyle (2)
2. O'Brien (22)
3. O'Connell (20)
4. O'Connor (12)
5. O'doherty (1)
6. O'Donnell (1)
7. O'Flahertey (1)
8. O'Gorman (1)
9. O'Grady (2)
10. O'Halloran (2)
11. O'Hara (1)
12. O'Hare (1)
13. O'Keefe (1)
14. O'Keeffe (1)
15. O'Key (1)
16. O'Leary (2)
17. O'Malley (1)
18. O'meagher (3)
19. O'neal (1)
20. O'Neil (4)
21. O'Neill (15)
22. O'reilly (2)
23. O'Rourke (1)
24. O'Shea (2)
25. O'Sullivan (2)
26. O'Toole (3)
27. Oady (1)
28. Oak (1)
   29. Oakden (1)
30. Oake (1)
31. Oakenfold (2)
32. Oakes (4)
33. Oakey (2)
34. Oakley (26)
35. Oaks (2)
36. Oates (12)
37. Oatis (1)
38. Oatway (1)
39. O’Toole (1)
40. Ober (4)
41. Obern (3)
42. Oberzanek (2)
43. Oborn (14)
44. Obron (1)
45. Ockey (2)
46. Oddy (27)
47. Odell (31)
48. Odem (1)
49. Odgers (12)
50. Odone (1)
51. Oedingen (1)
52. of Aquitaine (1)
53. of Castile (1)
54. of Germany (1)
55. Offer (8)
56. Offord (1)
   57. Offutt (1)
58. Ogden (10)
59. Ogilvie (13)
60. Ogilvy (2)
61. Ogley (2)
62. Ohlson (10)
63. Olafsdatter (1)
64. Old (8)
65. Oldaker (1)
66. Olden (2)
67. Oldfield (6)
68. Oldham (1)
69. Olding (9)
70. Oldland (58)
71. Oldrey (1)
72. Oldring (6)
73. Olejnikac (5)
74. Oler (1)
75. Olesdatter (1)
76. Olfsson (1)
77. Oliver (138)
78. Olsen (1)
79. Olson (3)
80. Olsson (4)
81. Onions (11)
82. Onslow (2)
83. Oppenheimer (6)
84. Oram (61)
   85. Orchard (28)
86. Ordner (1)
87. Orford (2)
88. Orledge (1)
89. Orman (7)
90. Orme (33)
91. Ormond (1)
92. Ormsby (3)
93. Orr (3)
94. Ortlip (1)
95. Orton (10)
96. Ory (1)
97. Osborn (5)
98. Osborne (33)
99. Osland (1)
100. Osment (15)
101. Osmond (4)
102. Ossub (1)
103. Osterhout (2)
104. Ostime (1)
105. Ostle (1)
106. Ostlife (2)
107. Ostlund (1)
108. Oswin (3)
109. Otes (3)
110. Ott (1)
111. Ottaway (1)
112. Otter (29)
   113. Ottewell (1)
114. Otto (2)
115. Oughten (1)
116. Oughton (2)
117. Outlaw (11)
118. Outram (1)
119. Outrim (1)
120. Ovenden (2)
121. Overall (5)
122. Overend (2)
123. Overfield (1)
124. Overman (1)
125. Overson (1)
126. Overton (2)
127. Overy (1)
128. Owen (96)
129. Owens (68)
130. Owers (8)
131. Owsin (1)
132. Oxborow (1)
133. Oxborrow (36)
134. Oxbury (1)
135. Oxland (2)
136. Oxley (4)
137. Oxspring (2)
138. Ozsoydan (2)
139. Ozzard (3)