Surname List: Begins with O
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All surnames beginning with O, sorted alphabetically (total individuals):
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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'Conner (1) 14. O'Connor (4) 15. O'Connors (1) 16. O'Daniel (3) 17. O'Day (4) 18. O'Dell (4) 19. O'Donley (2) 20. O'Donnell (4) 21. O'Donoghue (1) 22. O'Grady (1) 23. O'Guinn (1) 24. O'Hair (1) 25. O'Hanlon (1) 26. O'Hara (1) 27. O'Hearn (1) 28. O'Holeran Pritchard (1) 29. O'Kelly (2) 30. O'Malley (1) 31. O'Mara (3) 32. O'Neal (14) 33. O'Neil (2) 34. O'Neill (2) 35. O'Neille (1) 36. O'Rear (2) 37. O'Rourke (2) 38. O'Steen (1) 39. O'Sullivan (1) 40. Oakes (6) 41. Oakes Lawrence (1) 42. Oakley (17) 43. Oates (3) |
44. Obama (1) 45. Obenshain (1) 46. Oberholser (1) 47. Oberholtzer (3) 48. Oberlander (1) 49. Oberle (1) 50. Obermire (1) 51. Obley (1) 52. Obrien (1) 53. Ocheltree (1) 54. Ocher (1) 55. Ochsenbein (1) 56. Odaniel (1) 57. Oday (1) 58. Odell (3) 59. Oden (2) 60. Odham (1) 61. Odle (1) 62. Odom (6) 63. Odor (1) 64. Odum (1) 65. Oehler (5) 66. Of Leinster (2) 67. of Maine (2) 68. of Mar (1) 69. Of Mercia (2) 70. Of Scotland (7) 71. Of Wessex (1) 72. Ogden (4) 73. Ogg (2) 74. Ogilvy (10) 75. Ogle (24) 76. Oglesby (5) 77. Ogletree (3) 78. Ohair (1) 79. Ohlson (1) 80. Ohlsson (1) 81. Ohman (1) 82. Ohmart (2) 83. Olafsdatter (4) 84. Olafsson (2) 85. Olarrea (1) 86. Oldaker (1) |
87. Oldenburg (12) 88. Oldfield (1) 89. Oldham (7) 90. Oldman (1) 91. Oldring (1) 92. Olds (3) 93. Olen (1) 94. Olfers (1) 95. Olham (1) 96. Olhausen (1) 97. Oliger (2) 98. Olinger (2) 99. Olio (1) 100. Oliphant (9) 101. Olive (2) 102. Oliver (32) 103. Ollis (4) 104. Olmstead (6) 105. Olmsted (5) 106. Olofsdotter (1) 107. Olsen (3) 108. Olson (8) 109. Oman (2) 110. Omer (1) 111. Omohundro (2) 112. Oncale (1) 113. Oneal (2) 114. Oneil (1) 115. Onesi (1) 116. Oney (6) 117. Ong (1) 118. Only (1) 119. Onstott (2) 120. Opdyke (1) 121. Oram (1) 122. Orander (1) 123. Orange (4) 124. Orboda (1) 125. Orcutt (1) 126. Orem (2) 127. Orgain (1) 128. Orkney (2) 129. Orlean (1) |
130. Orman (2) 131. Ormand (2) 132. Orme (1) 133. Ormiston (1) 134. Ormond (1) 135. Ormondie (1) 136. Ormsby (5) 137. Ornduff (1) 138. Orne (2) 139. Orona (1) 140. Orr (384) 141. Orrick (2) 142. Orser (1) 143. Orsik (1) 144. Ortagus (1) 145. Orth (1) 146. Orto (1) 147. Orton (1) 148. Osborn (33) 149. Osborn White (1) 150. Osborne (57) 151. Osburn (26) 152. Osgood (2) 153. Oshman (1) 154. Oslac (1) 155. Osler (3) 156. Osmer (1) 157. Osmon (2) 158. Osmun (1) 159. Ossory (4) 160. Ostaggi (1) 161. Osteen (9) 162. Ostenberg (2) 163. Oster (3) 164. Osterburg (1) 165. Osterloo (1) 166. Osterstock (1) 167. Ostrom (1) 168. Oswald (6) 169. Oswalt (19) 170. Otero Marrero (1) 171. Otis (1) 172. Otlipp (1) |
173. Otstot (1) 174. Ott (20) 175. Ottarsson (2) 176. Otto (5) 177. Otts (1) 178. Otwell (1) 179. Ouderkirk (1) 180. Oulton (1) 181. Ours (1) 182. Ousley (1) 183. Ousterbought (1) 184. Outland (4) 185. Outlaw (1) 186. Outten (3) 187. Overall (3) 188. Overbay (1) 189. Overby (3) 190. Overcash (27) 191. Overcast (1) 192. Overholt (1) 193. Overman (3) 194. Overstreet (19) 195. Overton (2) 196. Oves (1) 197. Ovitt (1) 198. Owen (38) 199. Owenby (3) 200. Owens (48) 201. Owins (1) 202. Ownes (2) 203. Oxby (1) 204. Oxer (1) 205. Oxford (5) 206. Oxley (6) 207. Oyer (1) 208. Oylear (2) 209. Oyler (3) 210. Oyster (1) 211. Ozenbaugh (1) 212. Ozias (2) 213. Ozment (5) |