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Surname List: Begins with O


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

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1. O (1)
2. O Dell (2)
3. O Underhill (1)
4. O"CONNOR (1)
5. O"Donnell (1)
6. O'Bannon (4)
7. O'Beirne (4)
8. O'Boyle (1)
9. O'Bree (13)
10. O'Briant (1)
11. O'Brien (151)
12. O'Brien (OBrian) (1)
13. O'Brien-Ara (1)
14. O'Bryan (3)
15. O'Callaghan (26)
16. O'CALLAHAN (1)
17. O'Canaan (1)
18. O'Carroll (6)
19. O'Cathan (2)
20. O'Connell (19)
21. O'conner (6)
22. O'Connor (15)
23. O'Corra Curry (1)
24. O'Crowley (2)
25. O'cull (1)
26. O'Day (1)
27. O'Dea (3)
28. O'Dell (5)
29. O'Donall (1)
30. O'Donel (1)
31. O'Donnal (1)
32. O'Donnell (13)
33. O'Dougherty (1)
34. O'Driscoll (5)
35. O'Dwyer (3)
36. O'Farrell (1)
37. O'Ferrall (1)
38. O'Gorman (3)
39. O'Grady (6)
40. O'Hagan (1)
41. O'Halloran (7)
42. O'Haloran (1)
43. O'Hanlon (1)
44. O'Hara (12)
45. O'Hare (2)
46. O'Hurley (2)
47. O'Kane (2)
48. O'Kearney (3)
49. O'KEEFE (5)
50. O'Keeffe (1)
51. O'Kelly (1)
52. O'LEARY (47)
53. O'Mahon (2)
54. O'Mahoney (3)
55. O'MALLEY (21)
56. O'Mara (1)
57. O'Meagher (1)
58. O'Mealy (later O'Malley) (2)
59. O'nbeal (1)
60. O'neal (4)
61. O'Neale (3)
62. O'Neil (18)
63. O'Neild (1)
64. O'Neile (1)
65. O'Neill (36)
66. O'Rahilly (4)
67. O'Rear (1)
68. O'Reilly (17)
69. O'Rorke (4)
70. O'Rourke (2)
71. O'Ryan (1)
72. O'SHANNESSEY (1)
73. O'Shaugnessy (1)
74. O'Shea (3)
75. O'Shera (1)
76. O'SULLIVAN (4)
77. O'Toole (3)
78. Oades (119)
79. Oakden (4)
80. Oake (1)
81. OáKeefe (1)
82. Oakenfull (1)
83. Oakes (64)
84. Oakey (1)
85. Oakland (11)
86. Oakley (34)
87. Oaks (16)
88. Oaksford (1)
89. Oar (7)
90. Oars (1)
91. Oastler (1)
92. OáSullivan (1)
93. Oaten (1)
94. Oates (1632)
95. Oates (Oddy) (1)
96. Oates (Otes) (4)
97. Oates (Otte) (2)
98. Oats (538)
99. Oatway (1)
100. Obee (1)
101. Obenchain (2)
102. Ober (1)
103. Oberhofer (3)
104. Oberon (1)
105. Oborn (1)
106. Oborne (1)
107. Obrey (1)
108. Ochoa (1)
109. Ochterlony (1)
110. Ockerby (1)
111. Ockham (1)
112. Ockley (3)
113. Ockwell (2)
114. Octavius (1)
115. Odams (1)
116. Oddy (10)
117. ODEL (1)
118. Odell (125)
119. Odey (4)
120. ODGEN (1)
121. Odger (2)
122. Odgers (5)
123. Odlin (2)
124. Odling (12)
125. ODLUM (5)
126. Odom (2)
127. OEHKLE (1)
128. Oehley (1)
129. Oelrichs (1)
130. Oertel (10)
131. of (13)
132. of Achalas (1)
133. of Alania (1)
134. of Albon (4)
135. of Aldithley (3)
136. of Aldithley (Audley) (1)
137. of Alemanni? (1)
138. of Alencon (1)
139. of Almaine (1)
140. of Alsace (2)
141. of Altdorf (1)
142. of Amnia (1)
143. of Andechs (1)
144. of Andechs-Merania (1)
145. of Anhalt-Köthen (1)
146. of Anjou (15)
147. of Antigny (1)
148. of Antioch (1)
149. of Antwerp (2)
150. of Aquitaine (6)
151. of Aquitaine, of Poitiers (1)
152. of Aquitaine, of Poitou (1)
153. of Aragón (14)
154. of Aragón, of Barcelona (1)
155. of Argyll (3)
156. of Arimathea (1)
157. of Arles (2)
158. of Armagnac (1)
159. of Armenia (2)
160. of Artois (11)
161. of Ascania (61)
162. of Athens (1)
163. of Austrasia (2)
164. of Austria (15)
165. of Austria-Este (1)
166. of Austria-Tuscany (1)
167. of Auvergne (1)
168. of Avesnes (of Hainaut) (1)
169. of Babenberg (4)
170. of Baden (3)
171. of Baden-Durlach (1)
172. of Bage (1)
173. of Bar (4)
174. of Bar-sur-Seine (1)
175. of Barby-Mühlingen (1)
176. of Barcelona (1)
177. of Barnstaple (1)
178. of Battenberg (6)
179. of Baudmon (1)
180. of Bavaria (19)
181. of Bavaria-Landshut (1)
182. of Bavaria-Munich (1)
183. of Beaujeu (Beaujolais) (1)
184. of Bentheim-Steinfurt (1)
185. of Berain (1)
186. of Berg(u) (1)
187. of Bergamo (1)
188. of Berlepsch (1)
189. of Bernadotte (1)
190. of Bernicia (4)
191. of Beverly (1)
192. of Bigorre (1)
193. of Bisey (1)
194. of Blois (13)
195. of Bohemia (32)
196. of Bohemia and Hungary (1)
197. of Borovsk (1)
   198. of Bosnia (1)
199. of Boulogne (2)
200. of Bourbon (11)
201. of Bourbon-La Marche (1)
202. of Bourbon-Palma (1)
203. of Bourbon-Parma (4)
204. of Bourbon-Two Sicilies (3)
205. of Bourbon-Two-Sicilies (1)
206. of Brabant (7)
207. of Braganza (1)
208. of Brancewell (1)
209. of Brandenburg (11)
210. of Brandenburg-Ansbach (2)
211. of Brandenburg-Bayreuth (2)
212. of Brandenburg-Kulmbach (2)
213. of Brandenburg-Schwedt (1)
214. of Brechin (2)
215. of Bretagne (1)
216. of Breton (1)
217. of Brieg (1)
218. of Brienne (4)
219. of Brittany (10)
220. of Broomshull (1)
221. of Brunswick (2)
222. of Brunswick and Lunenburg (1)
223. of Brunswick-Dannenberg (1)
224. of Brunswick-Grubenhagen-Einbeck (1)
225. of Brunswick-Lüneburg (13)
226. of Brunswick-Lüneburg, of Celle (1)
227. of Brunswick-Wolfenbuttel (6)
228. of Brunswick-Wolfenbüttel (7)
229. of Brunswick-Wolfenbüttel-Bevern (1)
230. of Bulgaria (1)
231. of Buonalbergo (1)
232. of Burgundy (43)
233. of Burgundy-Ivrea (1)
234. of Bytom (1)
235. of Byzantium (2)
236. of Cainhoe (7)
237. of Cambridge (3)
238. of Canossa (1)
239. of Carinthia (5)
240. of Carinthia-Tyrol (1)
241. of Carisbrook (1)
242. of Castile (7)
243. of Castile And Leon (2)
244. of Chalon (7)
245. of Champagne (1)
246. of Châtenois (1)
247. of Châtillon (3)
248. of Chester (1)
249. of Chiemsee (1)
250. of Cilli (1)
251. of Clarence (2)
252. of Clement (1)
253. of Clermont (1)
254. of Cleves (9)
255. of Clifton (4)
256. of Clinton (1)
257. of Cognac (1)
258. of Comburg (Komburg) (1)
259. of Conisburgh (1)
260. of Constantinople (2)
261. of Cornwall (2)
262. of Coucy (1)
263. of Courland (1)
264. of Courtenay (5)
265. of Cyllin (1)
266. of Dagsbourg (1)
267. of Dagsburg (1)
268. of Damascus (2)
269. of Dampierre (4)
270. of Danneskjold-Samsøe. (1)
271. of Denmark (17)
272. of Denmark and Norway (1)
273. of Devon (1)
274. of Dimitrov (1)
275. of Dmitrov (1)
276. of Douglas (1)
277. of Dreux (2)
278. of Dublin (1)
279. of Dunbar (1)
280. of Dunegal (1)
281. of Durazzo (2)
282. of Durham (1)
283. of East Anglia (1)
284. of East Frisia (1)
285. of Ebersdorf (1)
286. of Edessa (1)
287. of Egypt (1)
288. of Elchingen-Ravenstein (1)
289. of England (20)
290. of Erbach (2)
291. of Erbach-Schönberg (1)
292. of Essex (1)
293. of Estridsen (9)
294. of Faremoutiers (1)
295. of Flanders (13)
296. of Formbach (1)
297. of Fortià (1)
298. of France (14)
299. of Franconia (1)
300. of Friston (1)
301. of Friuli (3)
302. of Galitsch (1)
303. of Galitzky (1)
304. of Galloway (2)
305. of Gaunt (Ghent) (1)
306. of Geneva (3)
307. of Germany (4)
308. of Gilsland (2)
309. of Glinski (2)
310. of Glogau (1)
311. of Gloucester (1)
312. of Gorizia-Tyrol (1)
313. of Gorze (1)
314. of Grapfeld (1)
315. of Great Britain (1)
316. of Greece (1)
317. of Greece and Denmark, House of Oldenburg (1)
318. of Groitzsch (1)
319. of Grosmont (2)
320. of Guelders (Gueldres) (1)
321. of Guelph (1)
322. of Guînes (1)
323. of Guise (1)
324. of Gwent (1)
325. of Görlitz (1)
326. of Görz (Gorizia) (1)
327. of Habsburg (40)
328. of Hainaut (9)
329. of Hanau (1)
330. of Hanau-Lichtenberg and Müntzenberg (1)
331. of Hanover (6)
332. of Harcourt (2)
333. of Harde Knud (1)
334. of Hatton (1)
335. of Hauteville (15)
336. of Heinsberg (1)
337. of Henneberg (2)
338. of Hereford (2)
339. of Hesbaye (1)
340. of Hesse (23)
341. of Hesse-Darmstadt (3)
342. of Hesse-Kassel (2)
343. of Hesse-Philippsthal (1)
344. of Hinderink (1)
345. of Hohenberg (1)
346. of Hohenburg (Hohenzollern) (1)
347. of Hohenheim (1)
348. of Hohenlohe-Langenburg (5)
349. of Hohenstaufen (9)
350. of Hohenstein (1)
351. of Hohenthal (2)
352. of Hohenzollern (15)
353. of Holland (4)
354. of Holstein (1)
355. of Holstein-Itzehoe (1)
356. of Hungary (5)
357. of Ibelin (4)
358. of Ingersleben (1)
359. of Ireland (5)
360. of Isenburg-Limburg (1)
361. of Ivrea (3)
362. of Jaroslavl (1)
363. of Jerusalem (6)
364. of Jever (1)
365. of Joinville (1)
366. of Juliers (1)
367. of Jülich (1)
368. of Jülich-Berg (1)
369. of Kemeys (1)
370. of Kent (1)
371. of Khazaria (1)
372. of Khazaria (Tzitzak) (1)
373. of Kiev (1)
374. of Krosigk (1)
375. of Kuijc and Malsen (1)
376. of Laigle (1)
377. of Lancaster (3)
378. of Landen (2)
379. of Landsberg (1)
380. of Langley (1)
381. of Laon (1)
382. of Lechaber (1)
383. of Leiningen (2)
384. of Leiningen-Dagsburg (1)
385. of Leiningen-Dagsburg-Falkenburg (1)
386. of Lennox (1)
387. of León (1)
388. of Leszczyński (1)
389. of Leuchars (1)
390. of Leuchtenberg (1)
391. of Leuven (3)
392. of Lichtenberg (1)
393. of Liechtenstein (3)
394. of Limburg (1)
   395. of Limoges (1)
396. of Lindow-Ruppin (1)
397. of Lippe (1)
398. of Lippe-Biesterfeld (1)
399. of Lith (1)
400. of Lithuania (6)
401. of Londesbrough (2)
402. of Loon (de Looz) (1)
403. of Loon-Heinsberg (1)
404. of Lorche (1)
405. of Lorn (1)
406. of Lorne (1)
407. of Lorraine (18)
408. of Lotharingia (1)
409. of Louvain (3)
410. of Lower Burgundy (1)
411. of Lower Lorraine (2)
412. of Lusignan (4)
413. of Luxembourg (5)
414. of Luxembourg (of Bohemia) (1)
415. of Löwenstein-Wertheim-Rosenberg (5)
416. of Macon (1)
417. of Mâcon and Vienne (1)
418. of Maine (1)
419. of Malojaroslavsky (1)
420. of Mansfeld-Arnstein (1)
421. of Mar (2)
422. of Marash (1)
423. of Martin (4)
424. of Masovia (1)
425. of Maurienne, House of Savoy (1)
426. of Mayenne (1)
427. of Mecklenburg (2)
428. of Mecklenburg-Güstrow (2)
429. of Mecklenburg-Schwerin (9)
430. of Mecklenburg-Strelitz (5)
431. of Meissen (Meißen) (2)
432. of Melitene (1)
433. of Merania (1)
434. of Mercia (8)
435. of Mergentheim (1)
436. of Metz (7)
437. of Moab (1)
438. of Mojaisk (2)
439. of Montbéliard (4)
440. of Montenegro (1)
441. of Montfaucon (1)
442. of Montferrat (6)
443. of Montlhéry (1)
444. of Morggán (1)
445. of Moscow (45)
446. of Moselle (1)
447. of Nahash (1)
448. of Namur (5)
449. of Naples and Sicily (3)
450. of Nassau (6)
451. of Nassau-Dietz (1)
452. of Nassau-Ouwerkerk (1)
453. of Nassau-Usingen (1)
454. of Nassau-Weilburg (3)
455. of Navarre (12)
456. of Nazareth (1)
457. of Neufchâtel (1)
458. of Neuffen (1)
459. of Nevers (2)
460. of Nonant (Novaunt) (1)
461. of Nordgau (1)
462. of Normandy (11)
463. of Northampton (1)
464. of Northeim (2)
465. of Northumbria (14)
466. of Norway (1)
467. of Norwich (2)
468. of Novgorod (2)
469. of Nuremberg (1)
470. of Nürnberg (1)
471. of Oettingen (1)
472. of Oldenburg (10)
473. of Opole (1)
474. of Orange (3)
475. of Orange-Nassau (9)
476. of Orcades (1)
477. of Orleans (3)
478. of Paris (4)
479. of Paris (of Friuli) (2)
480. of Pawel-Rammingen (2)
481. of Penrhyn (1)
482. of Perche (1)
483. of Périgord (1)
484. of Pfirt (3)
485. of Picts (3)
486. of Poland (26)
487. of Polesworth (1)
488. of Polotsk (1)
489. of Pomerania (4)
490. of Pomerania-Stettin (1)
491. of Portugal (7)
492. of Portugal, of Braganza (1)
493. of Priest (1)
494. of Prum (1)
495. of Rascia, of Vukanovi? (1)
496. of Ravensberg (1)
497. of Reginar (2)
498. of Rethel (1)
499. of Reuss (1)
500. of Rheineck, of Salm (1)
501. of Rheinfelden (2)
502. of Ringleheim (1)
503. of Robert (1)
504. of Rosenburg (1)
505. of Rosenfeld (1)
506. of Rott (1)
507. of Rugia (1)
508. of Rumigny (1)
509. of Rurik Dynasty (11)
510. of Russia (11)
511. of Rügen (1)
512. of Saarbrücken (1)
513. of Saint Omer (1)
514. of Saint-Simon (1)
515. of Salisbury (1)
516. of Sardinia (4)
517. of Savoi (1)
518. of Savoie (1)
519. of Savoy (15)
520. of Savoy-Genoa (1)
521. of Saxe (1)
522. of Saxe-Altenburg (2)
523. of Saxe-Coburg and Gotha (7)
524. of Saxe-Coburg and Gotha, House of Wettin (2)
525. of Saxe-Coburg-Gotha, House of Wettin (1)
526. of Saxe-Coburg-Saalfeld (2)
527. of Saxe-Eisenach (2)
528. of Saxe-Gotha (2)
529. of Saxe-Gotha-Altenburg (1)
530. of Saxe-Hildburghausen (3)
531. of Saxe-Meiningen (2)
532. of Saxe-Weimar (1)
533. of Saxe-Weimar-Eisenach (1)
534. of Saxe-Weissenfels (1)
535. of Saxe-Wittenberg (3)
536. of Saxe-Zeitz (1)
537. of Saxony (11)
538. of Saxony (Saxe) (1)
539. of Sayn-Wittgenstein (2)
540. of Schauenburg (1)
541. of Schaumburg (1)
542. of Schaunberg (1)
543. of Schlesien Liegnitz (1)
544. of Schleswig (1)
545. of Schleswig-Holstein (1)
546. of Schleswig-Holstein-Sonderburg-Augustenburg (6)
547. of Schleswig-Holstein-Sonderburg-Beck, von Holstein-Beck, von Ziedewitz (1)
548. of Schleswig-Holstein-Sonderburg-Glucksburg (3)
549. of Schleswig-Holstein-Sonderburg-Glücksburg (5)
550. of Schleswig-Holstein-Sonderburg-Glücksburg, House of Oldenburg (1)
551. of Schwarzburg-Sondershausen (1)
552. of Schweidnitz (Świdnica) (1)
553. of Scotland (5)
554. of Scotland de Huntingdon (1)
555. of Seville (1)
556. of Shaftesbury (1)
557. of Sheba (1)
558. of Sheppey (1)
559. of Shrewsbury (1)
560. of Sicily (9)
561. of Sidon (1)
562. of Sigurd (1)
563. of Silesia-Glogau (1)
564. of Simmern (2)
565. of Slupsk (3)
566. of Slutsk (1)
567. of Smolensk (3)
568. of Solms-Laubach (4)
569. of Somerville (1)
570. of Sommerschenburg (1)
571. of Southwark (1)
572. of Spain (4)
573. of Spoleto (1)
574. of Sponheim (1)
575. of Staden (1)
576. of Stolberg (1)
577. of Strathbogie (6)
578. of Sulzbach (4)
579. of Supplinburg (1)
580. of Susa (1)
581. of Suzdal (2)
582. of Swabia (4)
583. of Swabia (Linzgau) (1)
584. of Süpplingenburg (1)
585. of Tankerville (1)
586. of Teck (3)
587. of Tegeingl (1)
588. Of Tellico (1)
589. of the Bani Cays Aylân (1)
590. of the Berbers (1)
591. of the Cenél Conaill dynasty (2)
   592. of the Cenél nEógain dynasty (5)
593. of the Franks (3)
594. of the Gaini (1)
595. of the Khozâites (1)
596. of the Palatinate (4)
597. of the Palatinate-Neuburg (1)
598. of the Palatinate-Zweibrücken (1)
599. of the Palatine of Neuburg (2)
600. of the Rhine (1)
601. of the Tatars (1)
602. of the Tower (1)
603. of the Two Sicilies (5)
604. of the Two Sicilies (Naples and Sicily) (1)
605. of the Uí Néill dynasty (1)
606. of the Visigoths (1)
607. of Thuringia (8)
608. of Totnes (1)
609. of Toulouse (3)
610. of Tours (2)
611. of Trotta-Treyden (1)
612. of Troy (2)
613. of Troyes (1)
614. of Tver (2)
615. of Tübingen (1)
616. of Uglitsch (3)
617. of Upper Lorraine (1)
618. of Valois (6)
619. of Valois and of the Vexin (1)
620. of Valois of Angoulême (1)
621. of van Rode (1)
622. of Varteig (1)
623. of Vaudémont (2)
624. of Verdun (1)
625. of Vermandois (3)
626. of Viennois (1)
627. of Vitebsk (1)
628. of Vladimir (2)
629. of Volgoda (1)
630. of Volok (1)
631. of Waldeck (1)
632. of Waldeck and Pyrmont (2)
633. of Wales (9)
634. of Wallingford (1)
635. of Wedderburn (1)
636. of Welf (7)
637. of Werle (4)
638. of Werle-Güstrow (1)
639. of Wessex (6)
640. of Westphalia (1)
641. of Wettin (48)
642. of Wettin, of Habsburg-Lorraine (1)
643. of Wigmore (1)
644. of Winchester (1)
645. of Wittelsbach (14)
646. of Woodstock (7)
647. of Worms (1)
648. of Worms and Rheingau (3)
649. of Wroclaw (1)
650. of Württemberg (7)
651. of Württemberg-Winnental (1)
652. of York (15)
653. of Ysenburg And Budingen (1)
654. of Ysenburg and Büdingen (2)
655. of Ysenburg und Büdingen (1)
656. of Ysenburg-Büdingen (1)
657. of Zeutch (1)
658. of Zähringen (17)
659. Offell (2)
660. Offen (1)
661. Offer (1)
662. Offerman (1)
663. Officer (47)
664. Offiler (1)
665. Offin (1)
666. Offler (2)
667. Offley (4)
668. Offner (1)
669. Offord (4)
670. of Babenberg (1)
671. Ogan (2)
672. Ogard (1)
673. Ogden (37)
674. Ogden? (1)
675. Ogdin (1)
676. Ogg (15)
677. Ogglesby (3)
678. Ogier (1)
679. Ogilvie (23)
680. Ogilvy (47)
681. OGILWY (1)
682. Ogle (61)
683. Ogleby (1)
684. Oglesby (25)
685. Oglethorpe (1)
686. Ogley (42)
687. Oglivie (1)
688. Ogman (10)
689. Ogonowski (3)
690. Ogorman (1)
691. Ogram (2)
692. Ogston (1)
693. Ohmart (3)
694. Oil (1)
695. Oke (18)
696. Okeover (1)
697. Okill (1)
698. Oktaviani (1)
699. Olafsdatter (1)
700. Olafsdotter (1)
701. Olafsdottir (1)
702. Olafsson (5)
703. Olafsson, Hvitrain (1)
704. Olchaoin (1)
705. Old (7)
706. Oldacres (1)
707. Oldaker (8)
708. Oldaker (doubt) (1)
709. OLDBURY (17)
710. Oldcorn (5)
711. Oldenburg (69)
712. Oldenburg of Denmark (1)
713. Older (1)
714. Oldershaw (1)
715. Oldfeild (1)
716. Oldfeylde (1)
717. Oldfield (240)
718. Oldford (1)
719. Oldham (24)
720. Oldhamstead (1)
721. Oldisworth (6)
722. Oldknow (3)
723. Oldland (4)
724. Oldman (4)
725. Oldridge (14)
726. Oldroyd (49)
727. OLDS (4)
728. Oldstock (1)
729. Olever (1)
730. Olga (1)
731. Oliemans (1)
732. Oliphant (28)
733. Olislagers (1)
734. Olivant (4)
735. Olive (26)
736. Oliver (399)
737. OLIVER (Marlow) (1)
738. Olivier (16)
739. Olle (1)
740. Ollershaw (1)
741. Ollerton (2)
742. Olley (1)
743. Olliff (18)
744. Olliffe (1)
745. Ollington (8)
746. Ollive (1)
747. Ollivier Oliver (1)
748. Ollmuchach (1)
749. Olmstead (4)
750. Olmsted (1)
751. Olney (6)
752. Olofsdotter (1)
753. Olofsdottir (1)
754. Olridge (2)
755. Olroyd (3)
756. Olsen (10)
757. Olson (4)
758. Olsson (2)
759. Olstead (1)
760. Olufsdatter (1)
761. Olver (2)
762. Olybrius (1)
763. Olyf (1)
764. Oman (2)
765. Omash (1)
766. OMeagher (1)
767. Omer (1)
768. Omeya (1)
769. Omoyi (1)
770. on Guelph (Welf) (4)
771. Onan (1)
772. Onassis (3)
773. Oneil (4)
774. ONG (3)
775. Onion (17)
776. Onions (4)
777. Onslow (4)
778. Onyett (1)
779. Onyon (1)
780. OÕNeil (3)
781. Oortwyn (1)
782. Opalinska (1)
783. Openshaw (1)
784. Opie (2)
785. Opp (1)
786. Oppé (5)
787. Oppenheim (1)
788. Oprinsen (1)
   789. or Pace (1)
790. Oram (7)
791. Orange (7)
792. Orby (1)
793. Orchard (9)
794. Orcutt (3)
795. ORD (3)
796. Orde (8)
797. Orde-Powlett (17)
798. Ordidge (3)
799. Ordish (1)
800. Ore (1)
801. Orear (2)
802. Oreb (2)
803. Oreilly (1)
804. Orel (1)
805. Orem (1)
806. Orengo (1)
807. Orestilla (1)
808. Oreton (6)
809. Organ (4)
810. Orgill-Leman (1)
811. Oridge (1)
812. Orkney (6)
813. Orlafsson (1)
814. Orloff-Davidoff (2)
815. ORLOV (1)
816. ORMAN (1)
817. Orme (16)
818. Ormerod (3)
819. Ormesher (6)
820. Ormisher (12)
821. Ormiston (1)
822. Ormond (4)
823. Ormondroyd (1)
824. Ormrod (5)
825. Ormsby (25)
826. Ormsby-Gore (16)
827. Ormston (32)
828. Ornsby (8)
829. Orpen (2)
830. Orr (21)
831. Orr Ewing (1)
832. Orreby (1)
833. Orrell (4)
834. Orridge (23)
835. Orriel (2)
836. Orril (1)
837. Orriss (3)
838. Orrock (1)
839. Orrow (1)
840. Orsini (8)
841. Orthner (9)
842. Orthwein (1)
843. Ortiay (2)
844. ORTIZ (1)
845. ORTIZ AYALA (1)
846. ORTIZ PERNIA (1)
847. Ortlöpp (1)
848. Orton (79)
849. Ortzen (2)
850. Orvis (1)
851. Orzechowska (1)
852. Osbaldeston (4)
853. OSBALDISTON (16)
854. Osboorn (1)
855. Osborn (90)
856. Osborne (171)
857. OSBORNE-Taylor (1)
858. Osbourn (1)
859. Osbourne (11)
860. Osburn (1)
861. Oscroft (2)
862. Osgaby (1)
863. Osgerby (6)
864. Osgood (1)
865. Osgood-Ball (1)
866. Osgorby (Osgerby) (1)
867. Oskins (5)
868. Osler (3)
869. Osman (4)
870. Osmond (3)
871. Osoria (2)
872. Osorio (1)
873. Ossitt (2)
874. Ostcliff (1)
875. Ostenfeld (5)
876. Ostenfeldt (1)
877. Osterfield (1)
878. Osterheyer (1)
879. Osterkamp (1)
880. Osterloh (1)
881. Osterman (2)
882. Ostick (1)
883. Ostin (1)
884. Ostler (6)
885. Ostlife (2)
886. Ostorero (1)
887. Oswald (5)
888. Oswat (1)
889. Oswin (11)
890. Otcher (1)
891. Otes (27)
892. Otes (Oates) (1)
893. Otho (2)
894. Otis (15)
895. Otley (93)
896. Ots (9)
897. Ott (39)
898. Ott (Oates) (1)
899. Ottarsson (1)
900. Ottaway (3)
901. Otte (39)
902. Otten (6)
903. Otter (37)
904. Ottes (1)
905. Ottirburn (3)
906. Ottley (6)
907. Otto (1)
908. Otton (7)
909. Ottoway (2)
910. OTWAY (7)
911. Otzen (1)
912. Otzen Or Ottesen (1)
913. Oughtebridge (1)
914. Oughterstone (2)
915. Oughtibridge (88)
916. Oughton (5)
917. Oughtred (7)
918. Ouldridge (23)
919. Ouldroyde (1)
920. Oulton (3)
921. Ounsley (41)
922. OUNSTEAD (3)
923. Ounsted (2)
924. Outen (1)
925. Outerbridge (1)
926. Outeria (1)
927. Outhwaite (23)
928. Outman (1)
929. Outram (14)
930. Outred (1)
931. Outwin (99)
932. Ouzman (1)
933. Ovendale (1)
934. Overbeek (3)
935. Overbury (3)
936. Overend (193)
937. Overfield (2)
938. OVERHEAD (1)
939. Overman (2)
940. Oversby (3)
941. Oversee (1)
942. Overstone (3)
943. Overton (48)
944. OVERY (4)
945. Ovey (1)
946. Ovington (1)
947. Owbridge (3)
948. Owen (166)
949. Owens (31)
950. Ower (Oar) (1)
951. Owers (1)
952. OWIN (1)
953. Owles (2)
954. Owlett (1)
955. Ownsworth (2)
956. Owsley (1)
957. Owst (2)
958. Owston (1)
959. Oxby (2)
960. Oxenberry (26)
961. Oxenbridge (16)
962. Oxenbury (61)
963. Oxenden (2)
964. Oxenford (1)
965. Oxenforth (29)
966. Oxenham (15)
967. Oxer (17)
968. Oxford (17)
969. Oxley (129)
970. Oxtaby (1)
971. Oxtaby (Oxtarby, Oxterby, Oxtoby, Oxterby) (3)
972. Oxterby (1)
973. Oxtoby (54)
974. Oxton (2)
975. Oyitch (27)
976. Oyle (2)
977. Ozanne (5)
978. Ozbun (17)
979. Ozyer Keyes (5)
980. O`Kaine (1)
981. O`Kane (6)