Surname List: Begins with O: MontyHistNotes

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

1. O (1)
2. O Brien (3)
3. O'Banion (1)
4. O'Bannon (3)
5. O'Briant (1)
6. O'Brien (17)
7. O'Bryan (2)
8. O'Bryant (1)
9. O'Byrne (1)
10. O'Carrol (1)
11. O'Cathan (2)
12. O'Connell (9)
13. O'Connor (8)
14. O'Connors (1)
15. O'Daniel (3)
16. O'Day (5)
17. O'Dell (5)
18. O'Donley (2)
19. O'Donnell (4)
20. O'Grady (1)
21. O'Guinn (1)
22. O'Hair (1)
23. O'Hanlon (1)
24. O'Hara (1)
25. O'Hearn (1)
26. O'Holeran Pritchard (1)
27. O'Kelly (2)
28. O'Leary (2)
29. O'Malley (1)
30. O'Mara (3)
31. O'Neal (15)
32. O'Neil (3)
33. O'Neill (3)
34. O'Neille (1)
35. O'Rourke (4)
36. O'Steen (1)
37. O'Sullivan (1)
38. Oakes (5)
39. Oakes Lawrence (1)
40. Oakley (18)
41. Oates (3)
42. Obama (2)
43. Obenshain (1)
44. Oberholser (1)

45. Oberholtzer (3)
46. Oberkorn (3)
47. Oberlander (2)
48. Oberle (1)
49. Obermire (1)
50. Obrien (1)
51. Ocheltree (1)
52. Ocher (1)
53. Ochsenbein (1)
54. Odaniel (1)
55. Oday (1)
56. Odell (3)
57. Oden (4)
58. Odham (1)
59. Odle (1)
60. Odom (4)
61. Odor (1)
62. Odum (2)
63. Oehler (6)
64. Of Leinster (2)
65. of Maine (2)
66. of Mar (1)
67. Of Mercia (2)
68. Of Scotland (7)
69. Of Wessex (1)
70. Offner (1)
71. Offringa (1)
72. Ogden (4)
73. Ogg (2)
74. Ogilvy (10)
75. Ogle (22)
76. Ogle Moore (1)
77. Oglesby (3)
78. Ogletree (2)
79. Ohair (1)
80. Ohlson (1)
81. Ohman (1)
82. Ohmart (2)
83. Oie (1)
84. Okray (1)
85. Olack (1)
86. Olafsdatter (4)
87. Olafsson (2)
88. Olarrea (3)

89. Oldaker (1)
90. Oldenburg (12)
91. Oldfield (1)
92. Oldham (8)
93. Oldman (1)
94. Olds (3)
95. Olen (1)
96. Olfers (1)
97. Olham (1)
98. Olhausen (1)
99. Oliger (2)
100. Olinger (1)
101. Olio (1)
102. Oliphant (9)
103. Olive (4)
104. Oliver (37)
105. Ollis (5)
106. Olmstead (8)
107. Olmsted (6)
108. Olofsdotter (1)
109. Olsen (12)
110. Olson (9)
111. Oman (2)
112. Omohundro (2)
113. Oncale (1)
114. Oneal (3)
115. Onesi (1)
116. Ong (1)
117. Only (1)
118. Onstott (3)
119. Ontl (1)
120. Opal (1)
121. Opdyke (1)
122. Oram (1)
123. Orander (1)
124. Orange (4)
125. Orboda (1)
126. Orcutt (2)
127. Ord (1)
128. Orebaugh (1)
129. Oreilly (1)
130. Orem (2)
131. Orgain (1)
132. Orkney (2)

133. Orlean (1)
134. Orman (2)
135. Ormand (2)
136. Orme (1)
137. Ormiston (1)
138. Ormond (1)
139. Ormondie (1)
140. Ormsby (5)
141. Ornduff (1)
142. Orne (2)
143. Orona (1)
144. Orozco (1)
145. Orr (396)
146. Orrick (2)
147. Orser (1)
148. Orsik (3)
149. Ortagus (1)
150. Orth (1)
151. Ortiz (2)
152. Orto (2)
153. Orton (1)
154. Orwig (1)
155. Osborn (41)
156. Osborn White (1)
157. Osborne (63)
158. Osburn (2)
159. Osgood (2)
160. Oshman (1)
161. Oslac (1)
162. Osler (2)
163. Osmer (1)
164. Osmon (1)
165. Osmun (1)
166. Ossory (4)
167. Ostaggi (1)
168. Osteen (7)
169. Ostenberg (2)
170. Oster (4)
171. Osterburg (1)
172. Osterloo (1)
173. Osterman (1)
174. Osterstock (1)
175. Ostheimer (2)
176. Oswald (6)

177. Otero Marrero (1)
178. Otis (1)
179. Otlipp (1)
180. Otstot (1)
181. Ott (22)
182. Ottarsson (2)
183. Otto (3)
184. Ouderkirk (1)
185. Oulton (1)
186. Ours (1)
187. Ousley (1)
188. Ousterbought (1)
189. Outland (5)
190. Outlaw (2)
191. Outten (4)
192. Ovard (1)
193. Overall (3)
194. Overbay (1)
195. Overby (5)
196. Overcash (28)
197. Overfelt (1)
198. Overholt (1)
199. Overholtzer (1)
200. Overman (3)
201. Overmyer (1)
202. Overstreet (24)
203. Overton (5)
204. Oves (1)
205. Ovitt (1)
206. Owen (36)
207. Owen Southern (1)
208. Owenby (3)
209. Owens (51)
210. Oxby (1)
211. Oxer (1)
212. Oxford (4)
213. Oxley (6)
214. Oyer (1)
215. Oylear (3)
216. Oyler (4)
217. Oyster (1)
218. Ozias (2)
219. Ozment (5)