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Surname List: Begins with O


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

1. O Neil (1)
2. O' Brien (1)
3. O'Banion (11)
4. O'Briant (3)
5. O'Brien (17)
6. O'Connell (1)
7. O'Conner (2)
8. O'Connor (16)
9. O'Dell (7)
10. O'Donnal (2)
11. O'Donnell (12)
12. O'Driscoll (4)
13. O'Flannery (1)
14. O'Hare (1)
15. O'Killey (1)
16. O'Kussick (1)
17. O'Malley (1)
18. O'Meara (1)
19. O'Moore (1)
20. O'Neal (7)
21. O'Neil (31)
22. O'Neill (7)
23. O'Niel (1)
24. O'Sullivan (9)
25. O'Toole (2)
26. O'Warn (1)
27. Oaborn (1)
28. Oakden (1)
29. Oakes (1)
30. Oakeson (4)
31. Oakley (13)
32. Oakney (1)
33. Oaks (7)
34. Oats (1)
35. Obama (6)
36. Ober (2)
37. Oberdorf (1)
38. Oberg (1)
39. Oberholtzer (1)
40. Oberlander (2)
41. Obizzo (1)
42. Oborn (3)
43. Obotrites (1)
44. Obray (1)
45. Ocheltree (5)
46. Ockerman (1)
47. Ockey (1)
48. Oconner (1)
49. Odegaard (2)
50. Odegard (1)
   51. Odell (9)
52. Odemard (1)
53. Odendahl (3)
54. Odette (1)
55. Odinsson (1)
56. Odle (4)
57. Oehmig (1)
58. Oelkers (1)
59. Oelsner (1)
60. Oesterling (8)
61. Oetzel (1)
62. Officer (1)
63. Offredi (1)
64. Ofgren (1)
65. Ogborne (2)
66. Ogden (29)
67. Ogilive (1)
68. Ogilvie (2)
69. Ogilvy (3)
70. Ogiz (1)
71. Oglesby (3)
72. Oglethorpe (1)
73. Ogren (2)
74. Ohland (2)
75. Ohman (1)
76. Oke (1)
77. Okerlund (1)
78. Okey (3)
79. Okoorian (1)
80. Olafrsdatter (1)
81. Olafsdatter (4)
82. Olafsdotter (3)
83. Olafsdottir (2)
84. Olafson (1)
85. Olafsson (6)
86. Olasdotter (5)
87. Olasson (4)
88. Olavsdatter (8)
89. Olavsen (2)
90. Olavsson (1)
91. Olcháin (1)
92. Olcott (2)
93. Old (1)
94. Oldaker (1)
95. Olden (1)
96. Oldenburg (25)
97. Older (1)
98. Oldfield (33)
99. Oldham (26)
100. Oldroyd (2)
   101. Olds (12)
102. Oleksyn (1)
103. Oler (2)
104. Oles (9)
105. Olesdatter (4)
106. Olesen (2)
107. Olin (52)
108. Olinger (5)
109. Oliphant (11)
110. Olive (2)
111. Oliver (55)
112. Oliverson (7)
113. Olivier (71)
114. Olka (8)
115. Olkowski (1)
116. Ollchrothach (1)
117. Ollier (1)
118. Olliver (8)
119. Ollom (1)
120. Olmstead (48)
121. Olmsted (1)
122. Olmucaid (1)
123. Olnay (1)
124. Olney (327)
125. Olofsdotter (12)
126. Olofsdottir (2)
127. Olofson (1)
128. Olofsson (14)
129. Olpin (3)
130. Olrik (1)
131. Olsdatter (42)
132. Olsdotter (21)
133. Olsdottir (4)
134. Olsen (233)
135. Olson (95)
136. Olsson (29)
137. Olufsen (2)
138. Olufsson (3)
139. Olyff (1)
140. Oman (22)
141. Omar (1)
142. Onan (5)
143. Ondler (1)
144. Ondovcik (5)
145. Ondovick (1)
146. Oneil (3)
147. Oney (1)
148. Ongley (1)
149. Op den Graeff (1)
150. Opdahl (1)
   151. Opie (8)
152. Oppenheim (1)
153. Oram (1)
154. Orban (2)
155. Orchard (3)
156. Orcutt (4)
157. Ord (2)
158. Ordway (1)
159. Oreno (1)
160. Orewiler (1)
161. Orfitus (1)
162. Orgill (9)
163. Orkney (2)
164. Orlandos (1)
165. Orleans (8)
166. Ormand (1)
167. Orme (1)
168. Ormiston (1)
169. Ormond (10)
170. Ormsbee (13)
171. Ormsby (4)
172. Orphey (1)
173. Orr (11)
174. Orris (16)
175. Orrison (1)
176. Orry (2)
177. Orsborn (1)
178. Orsel (2)
179. Orsi (1)
180. Orth (5)
181. Ortiz (1)
182. Orton (31)
183. Orvice (1)
184. Orwin (8)
185. Os (1)
186. Osborn (29)
187. Osborne (26)
188. Osbourn (1)
189. Osburn (16)
190. Oscarson (1)
191. Oscroft (1)
192. Oseth (1)
193. Osgood (4)
194. Osguthorpe (1)
195. Oslund (1)
196. Osmun (1)
197. Osswald (1)
198. Ostensen (1)
199. Osterhout (10)
200. Osterlin (2)
   201. Ostermann (8)
202. Ostler (168)
203. Ostrander (12)
204. Ostrom (14)
205. Ostrowski (1)
206. Oswald (15)
207. Oteley (8)
208. Otis (26)
209. Otley (1)
210. Ott (1)
211. Ottarrsson (1)
212. Ottati (1)
213. Otterburn (1)
214. Otterburne (5)
215. Ottersdotter (3)
216. Ottersen (7)
217. Otterstad (1)
218. Otterstrom (13)
219. Ottesdotter (3)
220. Ottesen (1)
221. Ottinger (15)
222. Ottley (23)
223. Ottman (7)
224. Otto (9)
225. Ottosen Nors (1)
226. Outcalt (1)
227. Outzen (14)
228. Ouzexre (1)
229. Ovaitt (1)
230. Ovard (1)
231. Overacker (1)
232. Overby (1)
233. Overgard (1)
234. Overlade (1)
235. Overman (1)
236. Overmann (1)
237. Overmeyer (1)
238. Overson (6)
239. Overton (32)
240. Oveson (13)
241. Oviatt (4)
242. Owen (39)
243. Owens (26)
244. Ower (6)
245. Owings (1)
246. Owres (1)
247. Oxborrow (13)
248. Oxenbridge (1)
249. Oxley (1)
250. Oxman (1)