1. Aalders-Dunthorne
2. Aalders-Dunthrone
3. Abbas
4. Abbasi
5. Abbé
6. Abberton
7. Abbot
8. Abbott
9. Abbotts
10. Abdela
11. Abdel-Haq
12. Abdullah
13. Abdy
14. Abel
15. Abercorn
16. Abercromby
17. Aberdein
18. Abernethy
19. Abidogun
20. Abley
21. Abney-Hastings
22. Abouharb
23. Above
24. Ab-Owain
25. Abraham
26. Abrahams
27. Abrahamson
28. Abram
29. Abrams
30. Abse
31. Abu-Obadiah
32. Acevedo
33. Acheng
34. Acheson
35. Ackerley
36. Ackerman
37. Ackers
38. Ackland
39. Acklaw
40. Ackroyd
41. Acland
42. Acland-Hood
43. Acland-Troyte
44. A'Court
45. Acton
46. Acty
47. Acworth
48. Ada
49. Adair
50. Adam
51. Adams
52. Adam-Smith
53. Adamson
54. Adamson-Ross
55. Adare
56. Adcock
57. Addams
58. Adde
59. Adderley
60. Addey
61. Addinsell
62. Addis
63. Addison
64. Adeane
65. Adeeko
66. Adegoke
67. Ademolake
68. Adewunmi
69. Adewuyi
70. Adeyele
71. Adeyemo
72. Adkin
73. Adkins
74. Adlard
75. Adler
76. Adley
77. Adlington-Stringer
78. Adoh
79. Adoo-Kissi-Debrah
80. Adris
81. Adset
82. Adshead
83. Adye
84. Aeron-Thomas
85. Afolami
86. Afriyie
87. Afshari-Naderi
88. Afton
89. Afzal
90. Agar
91. Agar-Ellis
92. Agar-Robartes
93. Agarwal
94. Agbogun-Toko
95. Ager
96. Aggett
97. Agg-Gardner
98. Aggs
99. Aglionby
100. Agnew
101. Ahern
102. Aherne
103. Ahlstrom
104. Ahluwalia
105. Ahmad
106. Ahmad-Khan
107. Ahmed
108. Ahmed-Sheikh
109. Ahsan
110. Aibinu
111. Aiken
112. Ainger
113. Ainley
114. Ainscough
115. Ainscow
116. Ainsley
117. Ainslie
118. Ainsworth
119. Ainsworth-Barnes
120. Aird
121. Airey
122. Airlie
123. Aitchison
124. Aitken
125. Aitken-Davies
126. Aitkenhead
127. Aitman
128. Aiton
129. Ajderian
130. Ajoku
131. Akaki
132. Akan
133. Akberali
134. Akehurst
135. Aker
136. Akerman
137. Akeroyd
138. Akers-Douglas
139. Akhavan
140. Akhigbe
141. Akhtar
142. Akinbusoye
143. Akinoshun
144. Akinwale
145. Akister
146. Aklakul
147. Akram
148. Akroyd
149. Akst
150. Alagappa
151. Alagaratnam
152. Alberti
153. Albery
154. Albright
155. Albu
156. Alcantara
157. Alchin
158. Alcock
159. Alcroft
160. Aldam
161. Alden
162. Alder
163. Alderdice
164. Aldersey
165. Alderson
166. Alderton
167. Aldington
168. Aldous
169. Aldred
170. Aldrich
171. Aldridge
172. Alec-Smith
173. Alex
174. Alexander
175. Alexandra
176. Alford
177. Al-Hamdani
178. Ali
179. Alingham
180. Alison
181. Allaker
182. Allan
183. Allanach
184. Allanson
185. Allanson-Winn
186. Allason
187. Allatt
188. Allaun
189. Allcard
190. Allchin
191. Allcock
192. Allcroft
193. Alldrick
194. Alldritt
195. Allen
196. Allerston
197. Alley
198. Allhusen
199. Allie
200. Allighan
201. Allin-Khan
202. Allinson
203. Allison
204. Allister
205. Allitt
206. Allix
207. Allman
208. Allnatt
209. Allonby
210. Allott
211. Alloway
212. Allsebrook
213. Allsop
214. Allsopp
215. Allwright
216. Almond
217. Alpass
218. Alport
219. Alsager
220. Al-Samerai
221. Alson
222. Alsoodani
223. Alstead
224. Alston
225. Alton
226. Altree
227. Alty
228. Alves
229. Amadi
230. Aman
231. Ambache
232. Ambler
233. Ambridge
234. Ambrose
235. Ambrosino
236. Ambroze
237. Amcotts
238. Amcotts-Ingilby
239. Ameen
240. Amer
241. Amery
242. Amesbury
243. Amess
244. Amey
245. Amherst
246. Amies
247. Amin
248. Aminata
249. Amjad
250. Ammon
251. Amodu
252. Amor
253. Amory
254. Amos
255. Amphlett
256. Amstad
257. Amyes
258. Anachury
259. Anand
260. Ancram
261. Anderson
262. Anderson-Pelham
263. Anderton
264. Andras
265. Andrew
266. Andrewartha
267. Andrewes
268. Andrews
269. Angell
270. Angerstein
271. Angier
272. Anginotti
273. Angles
274. Anglezarke
275. Anglin
276. Angus
277. Anil
278. Ankers
279. Anklesalria
280. Annable
281. Annand
282. Annesley
283. Annett
284. A.N.ON
285. Anscomb
286. Ansell
287. Anselmi
288. Anslow
289. Anson
290. Anstee
291. Anstey
292. Anstis
293. Anstruther
294. Anstruther-Gray
295. Answer
296. Antar
297. Antcliffe
298. Anthony
299. Anton
300. Antoniazzi
301. Antoniou
302. Antrobus
303. Anwar
304. Appiah
305. Applebe
306. Appleby
307. Appleton
308. Appleton-Fox
309. Appleyard
310. Applin
311. Approaching
312. Apps
313. Ap-Roberts
314. Aquarone
315. Ara
316. Araba
317. Arain
318. Arakelian
319. Arasaratnam
320. Arblaster
321. Arbon
322. Arbour
323. Arbuthnot
324. Arch
325. Archbold
326. Archdale
327. Archdall
328. Archer
329. Archer-Shee
330. Archibald
331. Arden
332. Ardley
333. Argar
334. Argent
335. Argule
336. Argyle
337. Argyropulo
338. Arif
339. Arjomand
340. Arkell
341. Arkless
342. Arkwright
343. Arliss
344. Arlott
345. Armes
346. Armitage
347. Armitstead
348. Armston
349. Armstrong
350. Armstrong-Braun
351. Armstrong-Wilson
352. Arnall
353. Arndell
354. Arnold
355. Arnold-Forster
356. Arnold-Foster
357. Arnott
358. Aron
359. Aronsson
360. Arram
361. Arrey
362. Arrol
363. Arrowsmith
364. Arrundale
365. Arstall
366. Arthur
367. Artis
368. Artwell
369. Arty-Pole
370. Arundel
371. Asante
372. Asato
373. Ascher
374. Ascroft
375. Asghar
376. Ash
377. Ashall
378. Ashberry
379. Ashburner
380. Ashbury
381. Ashby
382. Ashcroft
383. Ashdown
384. Ashell
385. Ashenden
386. Asher
387. Ashey
388. Ashford
389. Ashforth
390. Ashington
391. Ashkenazi
392. Ashley
393. Ashley-Brown
394. Ashley-Cooper
395. Ashmead-Bartlett
396. Ashmore
397. Ashraf
398. Ashton
399. Ashurst
400. Ashwell
401. Ashworth
402. Aske
403. Asker
404. Askew
405. Askew-Robertson
406. Askwith
407. Aslam
408. Asmal
409. Aspden
410. Aspin
411. Aspinall
412. Aspinwall
413. Aspis
414. Asquith
415. Assad
416. Assheton
417. Assheton-Salton
418. Assinder
419. Astbury
420. Astell
421. Astins
422. Astley
423. Aston
424. Aston-Colquhoun
425. Astor
426. Atack
427. Ataman
428. Atcherley
429. Atha
430. Atherley
431. Atherley-Jones
432. Atherton
433. Athow
434. Athwal
435. Atkey
436. Atkin
437. Atkins
438. Atkinson
439. Atreides
440. Atroshi
441. Attard
442. Attenborough
443. Attewell
444. Attfield
445. Attlee
446. Attridge
447. Attwell
448. Attwood
449. Attwooll
450. Atwal
451. Aubel
452. Aubrey
453. Aubrey-Fletcher
454. Aubyn
455. August
456. Auguste
457. Augustine
458. Aujla
459. Auld
460. Auliff
461. Ault
462. Austen
463. Austick
464. Austin
465. Austins
466. Austin-Walker
467. Auton
468. Auty
469. Auvray
470. Avaei
471. Avebury
472. Aveling
473. Avery
474. Aves
475. Aveyard
476. Avino
477. Avis
478. Awan
479. Awbery
480. Awdry
481. Awolola
482. Axe
483. Axon
484. Aycliffe
485. Ayesh
486. Ayles
487. Aylett
488. Ayliffe
489. Ayling
490. Aylmer
491. Ayre
492. Ayres
493. Ayrton
494. Ayrton-Gould
495. Aytoun
496. Azam
497. Azeem
498. Aziz
499. Azmi