Surname List: Begins with O


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

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1. o 'Beolan (2)
2. o 'Brien (1)
3. o' Bannon (1)
4. o' Bell (9)
5. o' Beolain (1)
6. o' Boyle (1)
7. o' Breen (17)
8. o' Brennan (1)
9. o' Brian (12)
10. o' Brien (227)
11. o' Brien de Thomond (3)
12. o' Brien-Ara (1)
13. o' Bryan (5)
14. o' Bryen (4)
15. o' Byrne (4)
16. o' Caerbhaill (1)
17. o' Cahan (5)
18. o' Callaghan (35)
19. o' Carrol (1)
20. o' Carroll (7)
21. o' Cavanagh (2)
22. o' Cearbhall (2)
23. o' Cheinnselaig (14)
24. o' Chennselaig (1)
25. o' Chorb (1)
26. o' Chuind (1)
27. o' Conaing (1)
28. o' Connell (60)
29. o' Conner (1)
30. o' Conners (1)
31. o' Connor (61)
32. o' Connor-Kerry (1)
33. o' Connough (2)
34. o' Conor (6)
35. o' Conor Sligo (1)
36. o' Crega (1)
37. o' Cuillen (1)
38. o' Daire Rainey (1)
39. o' Dea (2)
40. o' Dell (6)
41. o' Dennel (1)
42. o' Docherty (2)
43. o' Donell (1)
44. o' Donnagan (1)
45. o' Donnel (1)
46. o' Donnell (53)
47. o' Donnell von Tyrconell (3)
48. o' Donnell von Tyrconnell (3)
49. o' Donoghue (1)
50. o' Donovan (3)
51. o' Draine (1)
52. o' Duibhne (1)
53. o' Dungalaig (1)
54. o' Duraghy (1)
55. o' Eagra (1)
56. o' Eidin (1)
57. o' Fallon (2)
58. o' Faolain (2)
59. o' Farrell (2)
60. o' Felan (1)
61. o' Ferral (1)
62. o' Ferrall-Boy (2)
63. o' Flaherty (4)
64. o' Fogarty (1)
65. o' Fogurty (1)
66. o' Garvey (2)
67. o' Grady (42)
68. o' Hagan (3)
69. o' Halloran (1)
70. o' Hara (28)
71. o' Hartigan (1)
72. o' Hea (1)
73. o' Hegerty (4)
74. o' Kane (2)
75. o' Keefe (6)
76. o' Keeff (1)
77. o' Keeley (3)
78. o' Kelly (6)
79. o' Kennedy (8)
80. o' Key (1)
81. o' Killey (1)
82. o' Knightley (2)
83. o' Lalor (1)
84. o' Lavery (2)
85. o' Leary (6)
86. o' Lorcain (1)
87. o' Loughnan (1)
88. o' Madden (2)
89. o' Mahony (1)
90. o' Maille Owen (1)
91. o' Maillend (3)
92. o' Malia (1)
93. o' Malley (3)
94. o' Mara (10)
95. o' Meagber (1)
96. o' Mealy (1)
97. o' Melaghlin (5)
98. o' Moore (14)
99. o' Morda (1)
100. o' More (5)
101. o' Mullane (1)
102. o' Mulloy (1)
103. o' Mulyran (1)
104. o' Murphy (1)
105. o' Neal (11)
106. o' Neale (4)
107. o' Neall (9)
108. o' Neil (3)
109. o' Néill (115)
110. o' Neill de Tyrone (1)
111. o' Nolan (1)
112. o' Phelan (1)
113. o' Pluingceid (1)
114. o' Quin (1)
115. o' Rear (1)
116. o' Regan (1)
117. o' Reilly (6)
118. o' Rorke (5)
119. o' Rourk (2)
120. o' Rourke (1)
121. o' Ruarc (5)
122. o' Ryn (1)
123. o' Shaughnessy (7)
124. o' Shea (1)
125. o' Sullivan (26)
126. o' Sullivan Beare (3)
127. o' Tard la Grange-Keith (1)
128. o' Toole (16)
129. O'Blennis (1)
130. Oachs (4)
131. Oadham (2)
132. Oak (1)
133. Oakden (1)
134. Oakes (33)
135. Oakey (5)
136. Oakleaf (1)
137. Oakley (16)
138. Oaks (6)
139. Oates (7)
140. Obachah (1)
141. Obama (5)
142. Obanion (1)
143. Obbard (1)
144. Obbema (1)
145. Obbens (1)
146. Obdam (1)
147. Obedience (1)
148. Obelink (1)
149. Obelitz (1)
150. Obell (1)
151. Oben (2)
152. Obenberg (1)
153. Obeniche (1)
154. Ober (7)
155. Oberacker zu Sieghartsstein (1)
156. Oberembt (2)
157. Oberhlotzer (1)
158. Oberholster (16)
159. Oberholzer (6)
160. Oberje (2)
161. Oberländer (4)
162. Oberleuter von Lassing (1)
163. Oberlin (2)
164. Obermair (2)
165. Obermayer (2)
166. Obermeyer (1)
167. Obernaür (1)
168. Oberstadt (1)
169. Obertacke (1)
170. Oberti (2)
171. Obijn (1)
172. Obolenska (1)
173. Obolenskaia (1)
174. Obolenskaja (1)
175. Obolensky (18)
176. Obolensky-Neledinsky-Meletzky (4)
177. Oboussier (1)
178. Obreen (12)
179. Obrenović (7)
180. Obrenovic (7)
181. Obrist (1)
182. Obukova (1)
183. Occo (2)
184. Ocem de Almeida (1)
185. Och (2)
186. Ochoa de Ondategui (2)
187. Ochs von Gunzendorf (2)
188. Ochs von Sonnau & Reichersperg (2)
189. Ochsin von Gunzendorf (1)
190. Ochterlony (3)
191. Ocieska (1)
192. Ockel (2)
193. Ockens (4)
194. Ockers (14)
195. Ockers Cau (2)
196. Ockerse (7)
197. Ockersse (27)
198. Ockerz. (1)
199. Ockes (2)
200. Ockhorst (4)
201. Ockhuysen (1)
202. Ockinga (5)
203. Ockstee (1)
204. Ocskay de Ocsko (1)
205. Octavius (1)
206. Octon (1)
207. Odard (2)
208. Odart (5)
209. Odart de Rilly d'Oysonville (1)
210. Odberre (1)
211. Odde (1)
212. Oddie (6)
213. Odding (2)
214. Oddyle (2)
215. Odé (1)
216. Odekerken (1)
217. Odell (18)
218. Odendaal (21)
219. Odendahl (1)
220. Odenhoven (1)
221. Odenthal (1)
222. Oder (3)
223. Odescalchi (29)
224. Odescalchi di Novara (1)
225. Odet (1)
226. Odette (1)
227. Odey (1)
228. Odgers (1)
229. Odier (2)
230. Odijk (1)
231. Odilia (1)
232. Odinck (1)
233. Odingsells (3)
234. Odink (1)
235. Odino (1)
236. Odinot (2)
237. Odinsson (1)
238. Odiorne (1)
239. Odland (4)
240. Odling (1)
241. Odlum (2)
242. Odoe (1)
243. Odoevskaya (2)
244. Odoevsky (1)
245. Odom (4)
246. Odone (4)
247. Odor (1)
248. Odou (1)
249. Odoyevskaya (1)
250. Odrowazowna (1)
251. Odson (1)
252. Odum (1)
253. Odygd (3)
254. Oechslin (1)
255. Oedses (1)
256. Oedtsma (3)
257. Oedtsma van Juckema (3)
258. Oeheim (2)
259. Oehler (1)
260. Oehlmann (1)
261. Oehninger (1)
262. Oeijen (1)
263. Oelbermann (1)
264. Oeler (5)
265. Oelhafen (1)
266. Oeloffse (1)
267. Oelofse (17)
268. Oelrich (2)
269. Oelrichs (5)
270. Oelwein (1)
271. Oem (77)
272. Oem van Arkel (1)
273. Oem van Bochoven (6)
274. Oem van Bockhoven (1)
275. Oem van Bokhoven (5)
276. Oem van Papendrecht (1)
277. Oem van Wijngaarden (34)
278. Oem van Wijngaerden (7)
279. Oem van Wyngaerden (1)
280. Oem van Zevender (2)
281. Oemcens (1)
282. Oenema (4)
283. Oentses (1)
284. Oepkes (2)
285. Oerinck (1)
286. Oerlemans (3)
287. Oertgen (2)
288. Oerthling (1)
289. Oertwein (2)
290. Oertwin (1)
291. Oesau (31)
292. Oesebrand (1)
   293. Oeser (2)
294. Oessendorff (1)
295. Oest (9)
296. Oesterberg (1)
297. Oesterlen (1)
298. Oesterling (1)
299. Oestermann (3)
300. Oesters (1)
301. Oesterschmidt (1)
302. Oestherhaut (1)
303. Oeteren (1)
304. Oeters van Maris (1)
305. Oetgens (10)
306. Oetgens van Waveren (5)
307. Oetgens van Waveren Pancras Clifford (16)
308. Oetgins (2)
309. Oetinger (2)
310. Oetker (9)
311. Oettingen (3)
312. Oettingen Ettinger-Halevi (1)
313. Oevermans (1)
314. Oexle von Friedenberg (1)
315. of Acre (1)
316. of Acton (2)
317. of Afrikiya (1)
318. of Agade (2)
319. of Ailech (1)
320. of Albha (1)
321. of Alcester (1)
322. of Aleppo (1)
323. of Allardice (1)
324. of Aller (4)
325. of Allerdale (1)
326. of Anathoth (1)
327. of Androssan (1)
328. of Angeln (3)
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330. of Angus (16)
331. of Antioch (1)
332. of Anu (1)
333. of Argyll (3)
334. of Argyllshire (12)
335. of Arimathaea (1)
336. of Armorica (2)
337. of Arrapachtis (1)
338. of Aspinall (4)
339. of Athol (5)
340. of Atholl (6)
341. of Babylon (5)
342. of Balcarrie (1)
343. of Ballagh (1)
344. of Bamborough (4)
345. of Bantry (1)
346. of Barenshill (2)
347. of Bedford (2)
348. of Beersheba (1)
349. of Bermingham (1)
350. of Bernica (16)
351. of Bernicia (4)
352. of Berry Pomeroy (1)
353. of Berwick (1)
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355. of Bodvel (1)
356. of Borthwick (2)
357. of Boscath (1)
358. of Bothwell (1)
359. of Braytoft (1)
360. of Bretargh (1)
361. of Bristol (1)
362. of Britons (1)
363. of Brittany (1)
364. of Brotherton (1)
365. of Buchan (2)
366. of Bulgaria (1)
367. of Burlington (1)
368. of Caithness (7)
369. of Callendar (3)
370. of Cambridge (11)
371. of Cardigan (1)
372. of Carew (1)
373. of Carlisle (1)
374. of Carrick (7)
375. of Cathcart (1)
376. of Chattan (10)
377. of Cheddar (1)
378. of Chester (3)
379. of Chesterfield (1)
380. of Chisholm (1)
381. of Cimmerians (11)
382. of Cinneal Eoguin (1)
383. of Clarence (4)
384. of Colchester (1)
385. of Connacht (1)
386. of Connaught (4)
387. of Corbi (1)
388. of Cordova (1)
389. of Cornwall (28)
390. of Cranntock (1)
391. of Cumbria (2)
392. of Dalradia (6)
393. of Deheubarth (1)
394. of Deira (2)
395. of Denia & Balearic (1)
396. of Denmark (2)
397. of Desmond (1)
398. of Devon (3)
399. of Dimitia (1)
400. of Docwra (1)
401. of Dol (5)
402. of Dorset (1)
403. of Douni (2)
404. of Draffen (1)
405. of Dublin (9)
406. of Dule (1)
407. of Dull (1)
408. of Dunbar (23)
409. of Durham (3)
410. of Dyfed (4)
411. of East Anglia (11)
412. of Eccles (2)
413. of Egypt (11)
414. of England (80)
415. of Essex (4)
416. of Ethod (1)
417. of Färlä (1)
418. of Fasselane (1)
419. of Fife (5)
420. of Finland (1)
421. of Flint (1)
422. of Folkestone (1)
423. of Foremark (1)
424. of Frankton (1)
425. of Frombourg (1)
426. of Galacia (1)
427. of Galbraith (2)
428. of Galicia (3)
429. of Gall (1)
430. of Galloway (3)
431. of Gask (1)
432. of Gibeah (2)
433. of Gilsland (3)
434. of Gloucester (13)
435. of Granada (1)
436. of Greece (1)
437. of Greenwille (2)
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442. of Hadeland (2)
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444. of Haselden (5)
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447. of Hedemarken (1)
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449. of Hiaz (1)
450. of High Ireby (1)
451. of Hijaz (2)
452. of Holland (10)
453. of Hordaland (1)
454. of Huntingdon (10)
455. of Huntington (5)
456. of Iraq (3)
457. of Ireby (1)
458. of Ireland (14)
459. of Isbell (2)
460. of Islay (1)
461. of Israel (1)
462. of Italy (2)
463. of Jerusalem (3)
464. of Jordan (1)
465. of Jotbah (1)
466. of Judah (18)
467. of Jutland (3)
468. of Kendal (1)
469. of Kent (30)
470. of Khazaria (2)
471. of Kherait (3)
472. of Kildare (1)
473. of Killeen (2)
474. of Kinalmeaky (1)
475. of Kingsley (6)
476. of Kish (10)
477. of Lagash (1)
478. of Lancaster (8)
479. of Leinster (9)
480. of Lennox (24)
481. of Lethington (1)
482. of Lethra (2)
483. of Levanach (2)
484. of Levanax (1)
485. of Levenach (1)
486. of Libnah (1)
487. of Lincoln (3)
488. of Loarn (1)
489. of Lochaber (8)
490. of Lochore (1)
491. of Lorn (6)
492. of Lot (2)
493. of Lumley (7)
494. of Lundy (1)
495. of Luss (2)
496. of Lyon Logie (1)
497. of Macedonia (1)
498. of Man (5)
499. of Man & Dublin & the Isles (1)
500. of Mar (6)
501. of Marr (1)
502. of Mawddy (1)
503. of Meirionydd (2)
504. of Menteith (2)
505. of Menteth (2)
506. of Mercia (71)
507. of Mexico (2)
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510. of Moab (2)
511. of Montal (1)
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515. of Monymusk (1)
516. of Moray (5)
517. of More (2)
518. of Mostyn (1)
519. of Moynet (2)
520. of Munster (2)
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523. of Newton (2)
524. of North Wales (1)
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527. of Northumberland (7)
528. of Northumbria (20)
529. of Norway (1)
530. of Nottingham (2)
531. of Novgorod (1)
532. of Orbe, Switzerland (1)
533. of Orkney (21)
534. of Orkney & Caithness (1)
535. of Ormonde (1)
536. of Osborn (1)
537. of Osraige (1)
538. of Osrhoene (1)
539. of Ossory (3)
540. of Persia (1)
541. of Portugal (3)
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545. of Raleigh (1)
546. of Rama (2)
547. of Ravensworth (2)
548. of Rhos (1)
549. of Rigsby (2)
550. of Ross (10)
551. of Rosse (1)
552. of Rumah (1)
553. of Ruthven (1)
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555. of Salisbury (3)
556. of Saltmarsh (1)
557. of Sanford (3)
558. of Scotland (73)
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560. of Scottish Dalradia (1)
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562. of Sens (1)
563. of Shinar (1)
564. of Shropshire (2)
565. of Sibton (1)
566. of Sicambri (15)
567. of Siluria (2)
568. of Skipwith (1)
569. of Slesvik (1)
570. of Solarys (1)
571. of South-Gyrwas (1)
572. of Spain (2)
573. of Sparshot (1)
574. of St. Martin (1)
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577. of Stra... (2)
578. of Strathbogie (1)
579. of Strathclyde (14)
580. of Strathearn (21)
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584. of Surrey (2)
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587. of Tatshull (1)
588. of the Angles (3)
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591. of the Baltic Goths (1)
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595. of the Iceni (1)
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597. of the Isles (5)
598. of the Jin (1)
599. of the Kumans (2)
600. of the Mountains (2)
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616. of Troy (41)
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628. of Wessex (46)
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639. of York (19)
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704. Ohman (2)
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735. Okle (2)
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738. Olafsson (13)
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748. Oldbury (3)
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750. Oldcastle (8)
751. Olde (14)
752. Oldehorst (2)
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754. Olden (8)
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