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Surname List: Begins with O


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

1. O Carrol Ó Cearbhaill (1)
2. Ó Mórdha (4)
3. Ó Mórdha, (3)
4. Ó Néill (2)
5. O' Connor (1)
6. O'Balbhan (1)
7. O'Braenain (1)
8. O'Brayan (1)
9. O'Brian (3)
10. O'Brien (11)
11. O'Bryan (22)
12. O'Carroll (9)
13. O'Cathain (1)
14. O'Connell (1)
15. O'Connor (1)
16. O'Conor (1)
17. O'Daniel (21)
18. O'Domnail (1)
19. O'Donnell (2)
20. O'Donovan (1)
21. O'Dunlainge (1)
22. O'Farrell (1)
23. O'Leary (17)
24. O'Madden (1)
25. O'Mattieo (1)
26. O'Molloy (1)
27. O'Morda (1)
28. O'Nan (1)
29. O'Neal (1)
30. O'Neil (1)
31. O'Neil of Ulster Macbrian (1)
32. O'Neill (13)
33. O'Nolan (1)
34. O'Pearce-Percy (1)
35. O'Reilly (4)
36. O'Sullivan (1)
37. O'Tuathail (1)
38. Oakley (1)
39. Oberst (5)
40. Obrian (1)
41. Obryan (1)
42. Ockol (1)
43. Ocley (1)
44. Odaniel (5)
45. Oddingseles (3)
46. Oddsson (1)
47. Odingsell (1)
48. Odingsells (1)
49. Odle (1)
50. Oechslin (1)
51. of Aagaard (1)
52. of Abernathy (1)
53. Of Acre (1)
54. Of Alba (1)
55. of Alburquerque (1)
56. Of Aldingham Le Fleming (1)
57. of Alemannia (2)
58. Of Allemagne (1)
59. Of Angers (1)
60. of Anglachgau (1)
61. Of Angus (1)
62. Of Anjou (1)
63. of Antwerp (1)
64. of Aquitaine (1)
65. Of Aragon (3)
66. of Arnesberg (1)
67. of Ashover (1)
    68. Of Atholl (2)
69. of Baux (1)
70. Of Bavaria (1)
71. Of Blithfield (1)
72. of Blois (2)
73. Of Bohemia And Hungary (1)
74. of Boulogne (1)
75. Of Brabant (1)
76. of Brereton (1)
77. of Brieg (1)
78. of Brittany (1)
79. of Brotherton (1)
80. of Brunswick-Lüneburg (1)
81. of Brzeg (1)
82. of Buchan (1)
83. Of Buckingham (1)
84. Of Buren (1)
85. of Burgundy (2)
86. of Calder (1)
87. Of Cambridge (1)
88. of Carlisle (2)
89. of Castile (3)
90. Of Champagne (1)
91. Of Chester (1)
92. of Clarence (1)
93. of Conisbrough (1)
94. Of Constantine (1)
95. Of Cornwal (1)
96. Of Cornwall (2)
97. of Corticella (1)
98. Of Coventry (1)
99. of Craghall (1)
100. Of Crostwick (1)
101. of Culane (1)
102. Of Cyfeiliog (1)
103. Of Danmartin (1)
104. of Dennis (1)
105. Of Devon (1)
106. of Dietz (1)
107. of Doncaster (1)
108. Of Dunbar (1)
109. of Edgar (1)
110. Of England (4)
111. Of Faucigny (1)
112. Of Fife (3)
113. Of Flanders (2)
114. Of Foremark (1)
115. of France (2)
116. Of Geneva (2)
117. of Gloucester (2)
118. of Grantland (1)
119. of Habsburg (1)
120. Of Halshany (1)
121. Of Hascombe (1)
122. of Hesbaye (1)
123. Of Holland (2)
124. of Holstein-Rendsburg (1)
125. Of Horestan (1)
126. Of Hungary (2)
127. Of Kent (2)
128. of Kiev (2)
129. of Lancashire (1)
130. of Lancaster (2)
131. Of Langfield (2)
132. of Langley (1)
133. of Laon (1)
134. of Leicestershire (1)
    135. Of Lennox (3)
136. of Leon (4)
137. Of Leon And Castile (2)
138. of Leslie (1)
139. of Liège (1)
140. of Lincolnshire (1)
141. of Lithuania (1)
142. of Lorraine (1)
143. of Lorraine-Vaudémont (1)
144. Of Luxembourg (2)
145. Of Luxemburg (1)
146. Of Macon (1)
147. Of MacRon (1)
148. Of Mar (2)
149. of Marr (2)
150. of Masovia (1)
151. of Meissen (1)
152. Of Mercia (1)
153. Of Metz (1)
154. Of Monmouth (2)
155. Of Namur (1)
156. Of Naples (1)
157. of Navarre (1)
158. of Nessius (1)
159. of Norfolk (1)
160. Of Normandy (1)
161. Of Northumbria (3)
162. of Norwich (1)
163. Of Ohningen (1)
164. of Paris (1)
165. Of Poland (1)
166. of Polesworth (1)
167. Of Polotzk (1)
168. Of Ponthieu (1)
169. Of Portugal (1)
170. of Provence (2)
171. Of Radcliffe (1)
172. Of Rhuddlan (1)
173. of Ross (1)
174. of Roucy (1)
175. Of Rutland (2)
176. of Salisbury (1)
177. Of Saluzzo, (1)
178. of Savoie (1)
179. Of Savoy (3)
180. of Saxe-Wittenberg (2)
181. Of Saxony (1)
182. Of Scotland (2)
183. Of Sicily (2)
184. of Standon (2)
185. Of Strathearn (1)
186. of Sulichgau (1)
187. Of The Isles (1)
188. of Toulouse (1)
189. of Verdun (1)
190. of Vienne (1)
191. of Viennois (1)
192. Of Winwick And Ashton (1)
193. of Woodstock (1)
194. of Worcestershire (1)
195. of Wurttemburg (1)
196. Of Yester (1)
197. Of York (3)
198. of Yorkshire (3)
199. Offing (2)
200. Offley (3)
201. Offyn (1)
    202. Ogard (1)
203. Ogden (3)
204. Ogg (1)
205. Ogilvey (1)
206. Ogilvie (5)
207. Ogilvie of Lintrathen (1)
208. Ogilvy (15)
209. Ogilvy of Aucherhouse (1)
210. Ogilvy Of Auchterhouse (3)
211. Ogistoune of Craggis and of that Ilk (1)
212. Ogle (3)
213. Oglesby (1)
214. Oglethorpe (4)
215. Oglivie (1)
216. Ogstoun (2)
217. Ohlsson (1)
218. Ohningen (1)
219. Oiler (1)
220. Okeefe (1)
221. Olafsdotter (1)
222. Olafsdottir (1)
223. Olafsson (2)
224. Olai Gestricus Niurenius (1)
225. Oldcastle (4)
226. Oldefylde (2)
227. Oldenburg (3)
228. Oldfield (2)
229. Oldhall (2)
230. Oldham (12)
231. Oldham, (3)
232. Oliphant (12)
233. Oliphant Of Aberdalgie (2)
234. Oliphant of Aberdalgir and Kellie (1)
235. Olive (1)
236. Oliver (27)
237. Ollerenshaw (2)
238. Olliver (1)
239. Ollsson (1)
240. Ollyver (4)
241. Olmstead (5)
242. Olney (2)
243. Olofsdotter (8)
244. Olofsdotter Löja Beronis (1)
245. Olofsson (8)
246. Olofsson Bure (4)
247. Olofsson Burman (1)
248. Olofsson Plantin (1)
249. Olovsdotter (1)
250. Olovsson Bure (1)
251. Olsdotter (1)
252. Olsen (2)
253. Olsen Lijnumval (1)
254. Olseth (2)
255. Olson (3)
256. Olsson (2)
257. Olufsdatter (1)
258. Olufsdatter Lunge (1)
259. Olufsdotter (1)
260. Olufsen (1)
261. Olufsson (2)
262. Olven (1)
263. Onedeby (1)
264. Onelye (1)
265. Onischak (1)
266. Onley (2)
267. Op den Graeff (1)
268. Orbon (3)
    269. Orchard (1)
270. Orcutt (1)
271. Orde (2)
272. Ore (1)
273. Orgill (1)
274. Örjansdotter (1)
275. Orleans (4)
276. Orm (2)
277. Ormesby (1)
278. Ormeston (6)
279. Ormsdotter (1)
280. Ormsson (1)
281. Orpewood (2)
282. Orr (2)
283. Orrell (4)
284. Orsini (2)
285. Orton (1)
286. Orvis (9)
287. Orvitt (1)
288. Osbaldeston (1)
289. Osbert (1)
290. Osborn (6)
291. Osborne (13)
292. Osborne Ray (1)
293. Osbourne (4)
294. Osbyrn (1)
295. Oseth (1)
296. Osgood (5)
297. Osorio Y. Bazán (1)
298. Osraige (1)
299. Ossory (4)
300. Oster (2)
301. Oswald (4)
302. Oteley (4)
303. Otis (1)
304. Otley (3)
305. Ott (22)
306. Otte (4)
307. Otten (1)
308. Ottirburn (2)
309. Ottley (1)
310. Ouchterlony-Auchterlonie of Kelly of that Ilk (2)
311. Oudart (1)
312. Ouldham (2)
313. Outram (6)
314. Ovendon (1)
315. Over De Vecht Van Vliet (1)
316. Overall (2)
317. Overfield (1)
318. Overholt (2)
319. Overton (3)
320. Overture (1)
321. Owain (1)
322. Owen (5)
323. Owens (3)
324. Oxenbridge (1)
325. Oxenbridge of Brede (1)
326. Oxenstierna (2)
327. Oxford (1)
328. Oxnam (1)
329. Oxton (1)
330. Ozbourne (1)
331. O’ Connor (1)
332. O’brien (1)

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