Surname List: Begins with O


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

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1. O'Brian (1)
2. O'Brien (10)
3. O'Connor (17)
4. O'Day (2)
5. O'Donnell (4)
6. O'Grodnick (2)
7. O'Gurkis (1)
8. O'Keefe (3)
9. O'Laughlin (2)
10. O'Leary (1)
11. O'Loughlin (1)
12. O'Malley (1)
13. O'Neal (8)
14. O'Neale (1)
15. O'Neill (6)
16. O'Niel (2)
17. O'Riordan (2)
18. O'Rourke (2)
19. O'Toole (9)
20. Oakes (11)
21. Oakley (2)
22. Oates (39)
23. Oats (4)
24. Obama (1)
25. Ober (1)
26. Oberch (1)
27. Oberdick (10)
28. Oberdorf (1)
   29. Oberley (1)
30. Oberly (1)
31. Obester (1)
32. Obringer (1)
33. Obst (2)
34. Obuszewiski (1)
35. Ocker (2)
36. Odell (5)
37. of Anjou (2)
38. of Aquitaine (1)
39. of Babenberg (2)
40. of Burgundy (4)
41. of Falaise (1)
42. of Germany (1)
43. of Herstal (1)
44. of Italy (2)
45. of Landen (2)
46. of Laon (2)
47. of Meaux (1)
48. of Metz (2)
49. of Normandy (3)
50. of Ponthieu (1)
51. of Saxony (2)
52. of Treves (1)
53. of Vermandois (4)
54. Ofensend (9)
55. Offensend (3)
56. Offensens (1)
   57. Offitt (1)
58. Offord (2)
59. Offutt (2)
60. Ofield (1)
61. Ogan (4)
62. Ogden (3)
63. Ogren (3)
64. Ohl (8)
65. Ohle (1)
66. Ohlman (5)
67. Ohman (1)
68. Old (3)
69. Olde (1)
70. Oldham (1)
71. Olds (3)
72. Oles (1)
73. Oleson (3)
74. Olinger (4)
75. Olinzer (1)
76. Oliver (27)
77. Ollie (3)
78. Olmstead (2)
79. Olney (1)
80. Olowocz (1)
81. Olsen (4)
82. Olson (17)
83. Olwert (1)
84. Omerod (1)
   85. Omps (5)
86. Omweg (4)
87. Onder (2)
88. Onderko (21)
89. Ondreako (1)
90. Onspaugh (2)
91. Oostrnder (2)
92. Oothout (1)
93. Orange (1)
94. Orcutt (4)
95. Ordal (1)
96. Orenak (1)
97. Orendorff (1)
98. Orlasky (4)
99. Orlo (1)
100. Orlosky (2)
101. Ornatoski (1)
102. Oroukin (1)
103. Orr (6)
104. Orris (1)
105. Orrs (8)
106. Orth (1)
107. Orton (1)
108. Orvell (1)
109. Orwick - Brooks (1)
110. Orwig (1)
111. Osborn (16)
112. Osborne (11)
   113. Osburn (1)
114. Osewski (1)
115. Osgood (1)
116. Oskin (19)
117. Osler (1)
118. Oston (1)
119. Ostrander (5)
120. Osunego (1)
121. Oswald (29)
122. Otesoo (1)
123. Otis (4)
124. Ott (4)
125. Ottes (1)
126. Otto (5)
127. Ouderkerk (1)
128. Oustler (1)
129. Overhaulser (1)
130. Overholt (1)
131. Overly (1)
132. Overman (11)
133. Oviatt (3)
134. Owen (24)
135. Owens (33)
136. Oxley (1)
137. Oymen (1)