Surname List: Begins with O


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

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1. O'BRIAIN (1)
2. O'BRIEN (27)
3. O'BYRNE (1)
4. O'CAELLAIDE (2)
5. O'CARROLL (5)
6. O'CONNELL (1)
7. O'CONNOR (7)
8. O'DEMPSEY (1)
9. O'DONNELL (1)
10. O'DONOUGHUE (1)
11. O'FLAHERTY (4)
12. O'FOGARTY (1)
13. O'GASCO (3)
14. O'KEEFE (1)
15. O'KENNEDY (2)
16. O'MOORE (1)
17. O'MORDA (3)
18. O'MULLOY (3)
19. O'NEIL (1)
20. O'NEILL (2)
21. O'R BALA AP MAREDUDD (1)
22. O'R HENDWR (1)
23. O'R RHUDDALT TUDUR (1)
24. O'RILEY (1)
25. O'SULLIVAN (1)
26. O'TOOL (1)
   27. O'TOOLE (2)
28. OAKS (2)
29. OARA (1)
30. OATES (1)
31. OBAMA (5)
32. OBERREID (2)
33. OBNECHT (4)
34. OCHS (2)
35. OCQUIDEM (2)
36. ODINGSELS (1)
37. ODOÁRIZ (1)
38. ODYNGSELES (2)
39. OFFALEY (1)
40. OGBORN (7)
41. OGBURN (2)
42. OGDEN (6)
43. OGILVY (2)
44. OGLE (5)
45. OGMUNDSSON (1)
46. OIKAWA (1)
47. OKESTON (1)
48. OLAFSDATTER (1)
49. OLAFSDOTTER (1)
50. OLAFSDOTTIR (3)
51. OLAFSSON (9)
52. OLAVSDATTER (1)
   53. OLAVSSON (3)
54. OLAVVSSON (1)
55. OLD (1)
56. OLDCASTLE (8)
57. OLDENBURG (2)
58. OLDFATHER (1)
59. OLDMAN (1)
60. OLDSON (1)
61. OLEGOVICH (4)
62. OLIPARAMPIL (1)
63. OLIPHANT (3)
64. OLIVER (2)
65. OLIVIER (2)
66. OLMSTEAD (7)
67. OLOFSDOTTER (1)
68. OLSEN (2)
69. OLTROGGE (1)
70. ONLEY (2)
71. ONNESLOW (1)
72. OOUTCHIBAHABANAU (1)
73. OPPRAECHT (1)
74. ORCHARD (1)
75. ORDÓÑEZ (27)
76. ORIELDIS (1)
77. ORILLON (6)
78. ORILLON CHAMPAGNE (1)
   79. ORKNEY (1)
80. ORMES (1)
81. ORMESTON-JOHNSTON (1)
82. ORMSDATTER (1)
83. ORMSEN (1)
84. ORMSSON (1)
85. ORR (3)
86. ORRE (1)
87. ORREBY (1)
88. ORRELL (1)
89. ORSEOLO (4)
90. ORSINI (10)
91. ORTIZ (3)
92. OSBORN (2)
93. OSBORNE (15)
94. OSÓREZ (3)
95. OSORIEZ (3)
96. OSORIO (1)
97. OSÓRIZ (4)
98. OSTRANDER (5)
99. OSWIN (6)
100. OTELEY (2)
101. OTHO (1)
102. OTHON (1)
103. OTT (3)
104. OTTER (1)
   105. OUASIBISKOUNESOUT (1)
106. OUDAIMY (1)
107. OUELLET (5)
108. OUELLETTE (14)
109. OUIMET (24)
110. OUIMET DIT BASTIEN (1)
111. OUIMETTE (1)
112. OUINET (4)
113. OUPITAOUABAMOUKOU (1)
114. OUROM (1)
115. OURSLER (1)
116. OUTLAND (4)
117. OVÉQUIZ (10)
118. OVERHOLSER (1)
119. OVERHULSER (1)
120. OVERSTREET (3)
121. OVERTON (3)
122. OWAIN (1)
123. OWEN (81)
124. OWEN (EVANS) (4)
125. OWENS (5)
126. OZUR (1)