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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 (22)
133. Olsdottir (4)
134. Olsen (234)
135. Olsen Reich (2)
136. Olson (95)
137. Olsson (29)
138. Olufsen (2)
139. Olufsson (3)
140. Olyff (1)
141. Oman (22)
142. Omar (1)
143. Onan (5)
144. Ondler (1)
145. Ondovcik (5)
146. Ondovick (1)
147. Oneil (3)
148. Oney (1)
149. Ongley (1)
150. Op den Graeff (1)
151. Opdahl (1)
152. Opie (8)
153. Oppenheim (1)
   154. Oram (1)
155. Orban (2)
156. Orchard (3)
157. Orcutt (4)
158. Ord (2)
159. Ordway (1)
160. Oreno (1)
161. Orewiler (1)
162. Orfitus (1)
163. Orgill (9)
164. Orkney (2)
165. Orlandos (1)
166. Orleans (8)
167. Ormand (1)
168. Orme (1)
169. Ormiston (1)
170. Ormond (10)
171. Ormsbee (13)
172. Ormsby (4)
173. Orphey (1)
174. Orr (11)
175. Orris (16)
176. Orrison (1)
177. Orry (2)
178. Orsborn (1)
179. Orsel (2)
180. Orsi (1)
181. Orth (5)
182. Ortiz (1)
183. Orton (31)
184. Orvice (1)
185. Orwin (8)
186. Os (1)
187. Osborn (29)
188. Osborne (26)
189. Osbourn (1)
190. Osburn (16)
191. Oscarson (1)
192. Oscroft (1)
193. Oseth (1)
194. Osgood (4)
195. Osguthorpe (1)
196. Oslund (1)
197. Osmun (1)
198. Osswald (1)
199. Ostensen (1)
200. Osterhout (10)
201. Osterlin (2)
202. Ostermann (8)
203. Ostler (168)
204. Ostrander (12)
   205. Ostrom (14)
206. Ostrowski (1)
207. Oswald (15)
208. Oteley (8)
209. Otis (26)
210. Otley (1)
211. Ott (1)
212. Ottarrsson (1)
213. Ottati (1)
214. Otterburn (1)
215. Otterburne (5)
216. Ottersdotter (3)
217. Ottersen (7)
218. Otterstad (1)
219. Otterstrom (13)
220. Ottesdotter (3)
221. Ottesen (1)
222. Ottinger (15)
223. Ottley (23)
224. Ottman (7)
225. Otto (9)
226. Ottosen Nors (1)
227. Outcalt (1)
228. Outzen (14)
229. Ouzexre (1)
230. Ovaitt (1)
231. Ovard (1)
232. Overacker (1)
233. Overby (1)
234. Overgard (1)
235. Overlade (1)
236. Overman (1)
237. Overmann (1)
238. Overmeyer (1)
239. Overson (6)
240. Overton (32)
241. Oveson (13)
242. Oviatt (4)
243. Owen (39)
244. Owens (26)
245. Ower (6)
246. Owings (1)
247. Owres (1)
248. Oxborrow (13)
249. Oxenbridge (1)
250. Oxley (1)
251. Oxman (1)