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

43. Obama (1)
44. Obenshain (1)
45. Oberholser (1)
46. Oberholtzer (3)
47. Oberlander (1)
48. Oberle (1)
49. Obermire (1)
50. Obley (1)
51. Obrien (1)
52. Ocheltree (1)
53. Ocher (1)
54. Ochsenbein (1)
55. Odaniel (1)
56. Oday (1)
57. Odell (3)
58. Oden (2)
59. Odham (1)
60. Odle (1)
61. Odom (5)
62. Odor (1)
63. Odum (1)
64. Oehler (5)
65. Of Leinster (2)
66. of Maine (2)
67. of Mar (1)
68. Of Mercia (2)
69. Of Scotland (7)
70. Of Wessex (1)
71. Ogden (4)
72. Ogg (2)
73. Ogilvy (10)
74. Ogle (24)
75. Oglesby (4)
76. Ogletree (3)
77. Ohair (1)
78. Ohlson (1)
79. Ohlsson (1)
80. Ohman (1)
81. Ohmart (2)
82. Olafsdatter (4)
83. Olafsson (2)
84. Olarrea (1)

85. Oldaker (1)
86. Oldenburg (12)
87. Oldfield (1)
88. Oldham (7)
89. Oldman (1)
90. Oldring (1)
91. Olds (3)
92. Olen (1)
93. Olfers (1)
94. Olham (1)
95. Olhausen (1)
96. Oliger (2)
97. Olinger (1)
98. Olio (1)
99. Oliphant (9)
100. Olive (2)
101. Oliver (32)
102. Ollis (4)
103. Olmstead (6)
104. Olmsted (5)
105. Olofsdotter (1)
106. Olsen (3)
107. Olson (8)
108. Oman (2)
109. Omohundro (2)
110. Oncale (1)
111. Oneal (2)
112. Onesi (1)
113. Oney (6)
114. Ong (1)
115. Only (1)
116. Onstott (2)
117. Opdyke (1)
118. Oram (1)
119. Orander (1)
120. Orange (4)
121. Orboda (1)
122. Orcutt (1)
123. Orem (2)
124. Orgain (1)
125. Orkney (2)
126. Orlean (1)

127. Orman (2)
128. Ormand (2)
129. Orme (1)
130. Ormiston (1)
131. Ormond (1)
132. Ormondie (1)
133. Ormsby (5)
134. Ornduff (1)
135. Orne (2)
136. Orona (1)
137. Orr (382)
138. Orrick (2)
139. Orser (1)
140. Orsik (1)
141. Ortagus (1)
142. Orth (1)
143. Orto (1)
144. Orton (1)
145. Osborn (33)
146. Osborn White (1)
147. Osborne (56)
148. Osburn (1)
149. Osgood (2)
150. Oshman (1)
151. Oslac (1)
152. Osler (3)
153. Osmer (1)
154. Osmon (2)
155. Osmun (1)
156. Ossory (4)
157. Ostaggi (1)
158. Osteen (9)
159. Ostenberg (2)
160. Oster (3)
161. Osterburg (1)
162. Osterloo (1)
163. Osterstock (1)
164. Ostrom (1)
165. Oswald (6)
166. Oswalt (19)
167. Otero Marrero (1)
168. Otis (1)

169. Otlipp (1)
170. Otstot (1)
171. Ott (20)
172. Ottarsson (2)
173. Otto (3)
174. Otts (1)
175. Otwell (1)
176. Ouderkirk (1)
177. Oulton (1)
178. Ours (1)
179. Ousley (1)
180. Ousterbought (1)
181. Outland (4)
182. Outlaw (1)
183. Outten (3)
184. Overall (3)
185. Overbay (1)
186. Overby (3)
187. Overcash (27)
188. Overholt (1)
189. Overman (3)
190. Overstreet (19)
191. Overton (2)
192. Oves (1)
193. Owen (38)
194. Owenby (3)
195. Owens (47)
196. Owins (1)
197. Ownes (2)
198. Oxby (1)
199. Oxer (1)
200. Oxford (5)
201. Oxley (5)
202. Oyer (1)
203. Oylear (2)
204. Oyler (3)
205. Oyster (1)
206. Ozias (2)
207. Ozment (5)