1. Laban
2. Labern
3. Labouchere
4. Labouchère
5. Lacaita
6. Lacey
7. Lack
8. Lacon
9. Lacy
10. Ladwa
11. Ladyman
12. Laffan
13. Lafone
14. Lagan
15. Lagden
16. Lageard
17. Lahiff
18. Lahteela
19. Laidlaw
20. Laidley
21. Laing
22. Lainson
23. Laird
24. Lait
25. Laitinen
26. Lake
27. Lakeman
28. Laker
29. Lakin
30. Lalek
31. Lalor
32. Lam
33. Lamb
34. Lambart
35. Lambell
36. Lambert
37. Lamberth
38. Lambie
39. Lambley
40. Lamborn
41. Lambourne
42. Lambton
43. Lamert
44. Lammiman
45. Lammy
46. Lamond
47. Lamont
48. Lamotte
49. Lampard-Vachell
50. Lampitt
51. Lamport
52. Lampvard-Vachell
53. Lamsley
54. Lancaster
55. Land
56. Landa
57. Landau
58. Landels
59. Lander
60. Landers
61. Landes
62. Landles
63. Lane
64. Lane-Fox
65. Lane-Mitchell
66. Lang
67. Langdale
68. Langdon
69. Langdon-Davies
70. Lange
71. Langen
72. Langford
73. Langford-Holt
74. Langhorn
75. Langley
76. Langley-Poole
77. Langmaid
78. Langmead
79. Langridge
80. Langsford
81. Langstaff
82. Langston
83. Lanham
84. Lanigan
85. Lanning
86. Lansbury
87. Lansdell
88. Lansley
89. Lant
90. Lanyon
91. Lappin
92. Lapthorn
93. Lapworth
94. Lardner
95. Largan
96. Large
97. Lark
98. Larkin
99. Larkins
100. Larmor
101. Larner
102. Larney
103. Larpent
104. Larrow
105. Lascelles
106. Lashmore
107. Lasko
108. Laslett
109. Lassen
110. Last
111. Latchford
112. Latham
113. Lathan
114. Lathrope
115. Lathwell
116. Latimer
117. Latteriere
118. Lauchlan
119. Laughland
120. Laughton
121. Laurence
122. Laurie
123. Lavalette
124. Lavelle
125. Lavender
126. Laverack
127. Lavers
128. Laverton
129. Laverty
130. Lavery
131. Laville
132. Lavin
133. Lavine
134. Lavis
135. Law
136. Lawal
137. Lawanson
138. Lawder
139. Lawes
140. Laweson
141. Lawler
142. Lawless
143. Lawley
144. Lawman
145. Lawn
146. Lawrance
147. Lawrence
148. Law-Riding
149. Lawrie
150. Laws
151. Lawson
152. Lawther
153. Lawton
154. Laxton
155. Layard
156. Laycock
157. Layland-Barratt
158. Layton
159. Lazarowicz
160. Lazarus
161. Lea
162. Leach
163. Leachman
164. Leadam
165. Leadbeater
166. Leadbetter
167. Leadbitter
168. Leader
169. Leadley
170. Leadsom
171. Leah
172. Leahy
173. Leak
174. Leake
175. Leakey
176. Leaman
177. Leamy
178. Lean
179. Leaney
180. Leaper
181. Lear
182. Learmonth
183. Learoyd
184. Leary
185. Leask
186. Leat
187. Leatham
188. Leather
189. Leatherbarrow
190. Leathley
191. Leavey
192. Leay
193. Lebar
194. Lebor
195. Leburn
196. Lechmere
197. Leck
198. Leckie
199. Lecky
200. Ledbury
201. Leddy
202. Ledger
203. Ledlie
204. Ledsom
205. Lee
206. Leeburn
207. Leech
208. Lee-Delisle
209. Leeder
210. Leedham
211. Leeds
212. Leek
213. Leeke
214. Leeman
215. Leeming
216. Leen
217. Leeper
218. Lees
219. Leese
220. Lees-Jones
221. Leeson
222. Lees-Smith
223. Leetham
224. Leevers
225. Lee-Warner
226. LeFever
227. Lefevre
228. Leff
229. Leffman
230. Lefroy
231. Legard
232. Legarda
233. Legg
234. Legge
235. Legge-Bourke
236. Legge-Burke
237. Leggett
238. Legh
239. Lehain
240. Lehal
241. Lehmann
242. Lehrle
243. Leicester
244. Leif-Jones
245. Leigh
246. Leigh-Bennett
247. Leigh-Clare
248. Leighter
249. Leighton
250. Leishman
251. Leitch
252. Leith
253. Leith-Hay-Clark
254. Lelliott
255. Lely
256. LeMaistre
257. Lemay
258. Lemkin
259. Lemon
260. Lendrick
261. Lenehan
262. Leng
263. Lennard
264. Lennon
265. Lennonx-Boyd
266. Lennox
267. Lennox-Boyd
268. Lenox
269. Lentaigne
270. Lenton
271. Leo
272. Leon
273. Leonard
274. Leon-Smith
275. Lepley
276. Lepori
277. Lepper
278. Leppert
279. Lerry
280. Lesiter-Burgess
281. Leslie
282. Leslie-Melville-Cartwright
283. Lesser
284. Lessing
285. Lester
286. Leston
287. Lestor
288. Le-Surf
289. Letch
290. Lethbridge
291. Lethem
292. Letsae
293. Lett
294. Lettice
295. Lettington
296. Letts
297. Letwin
298. Leuty
299. Lever
300. Leverett
301. Leverton-Harris
302. Leveson-Gower
303. Levick
304. Levin
305. Levine
306. Levinge
307. Levinson
308. Levita
309. Levitt
310. Levy
311. Levy-Lawson
312. Lewarne
313. Lewcock
314. Lewell-Buck
315. Lewenz
316. Lewer
317. Lewin
318. Lewington
319. Lewins
320. Lewis
321. Léwis
322. Lewisham
323. Lewis-Smith
324. Lewsley
325. Lewthwaite
326. Ley
327. Leycester
328. Leyland
329. Leyshon
330. Liardet
331. Lias
332. Libby
333. Lichten
334. Lichtenstein
335. Lickley
336. Lidbury
337. Liddall
338. Liddell
339. Liddell-Grainger
340. Liddiard
341. Liddicott
342. Liddle
343. Lidgett
344. Lidington
345. Liepins
346. Light
347. Lightbown
348. Lightfoot
349. Lightwing
350. Lightwood
351. Lile
352. Lilley
353. Lillie
354. Lillington
355. Lillis
356. Lillyman
357. Lim
358. Limmer
359. Limont
360. Linacre
361. Lincoln
362. Lind
363. Linden
364. Lindgren
365. Lindhurst
366. Lindley
367. Lindner
368. Lindo
369. Lindop
370. Lindsay
371. Lindsey
372. Lindsley
373. Line
374. Lines
375. Linfield
376. Linfoot
377. Ling
378. Lingard
379. Lingen-Barker
380. Lingens
381. Lingley
382. Link
383. Linklater
384. Linley
385. Linnegar
386. Linney
387. Linsey
388. Linskey
389. Linsley
390. Linstead
391. Linstrum
392. Linton
393. Lionel
394. Lipman
395. Lippiat
396. Lipson
397. Lipton
398. Lisburne
399. Lisgo
400. Lish
401. Lishman
402. Lisle
403. List
404. Lister
405. Lister-Kaye
406. Liston
407. Lit
408. Litchfield
409. Litherland
410. Lithgow
411. Litterick
412. Little
413. Littledale
414. Littlehales
415. Littlejohn
416. Littlemore
417. Little-Pengelly
418. Littleton
419. Littlewood
420. Litton
421. Litvin
422. Litvnoff
423. Litwin
424. Liverman
425. Liversuch
426. Livesey
427. Livie
428. Livings
429. Livingstone
430. Livney
431. Livsey
432. Lixenberg
433. Ljubisic
434. Llewellin
435. Llewellyn
436. Llewellyn-Jones
437. Llewelyn
438. Llewelyn-Davies
439. Llewelyn-Williams
440. Lloyd
441. Lloyd-Anstruther
442. Lloyd-Baker
443. Lloyd-Edwards
444. Lloyd-Eley
445. Lloyd-George
446. Lloyd-Graeme
447. Lloyd-Greame
448. Lloyd-Griffiths
449. Lloyd-Johnson
450. Lloyd-Jones
451. Lloyd-Mostyn
452. Lloyd-Nesling
453. Lloyd-Williams
454. Llwyd
455. Llywd
456. Llywelyn
457. Lo
458. Loach
459. Loader
460. Loakes
461. Lobb
462. Lobjoit
463. Lobley
464. Lobnitz
465. Lobo
466. Loch
467. Lochhead
468. Lochmuller
469. Lochner
470. Lochrane
471. Lochrie
472. Lock
473. Locke
474. Locker
475. Locker-Lampson
476. Lockett
477. Lockey
478. Lockhart
479. Lockie
480. Locksley
481. Lockwood
482. Lockyer
483. Locock
484. Loder
485. Lodge
486. Lofas
487. Lofthouse
488. Lofts
489. Loftus
490. Logan
491. Logan-Salton
492. Logue
493. Loi
494. Lokuciewski
495. Loman
496. Lomas
497. Lomax
498. London
499. Londsdale
500. Lone
501. Long
502. Long-Bailey
503. Longbottom
504. Longden
505. Longe
506. Longfield
507. Longhi
508. Longhorn
509. Longhurst
510. Longland
511. Longley
512. Longman
513. Longton
514. Longworth
515. Lonie
516. Lonsdale
517. Looker
518. Loonan
519. Lopes
520. Lopez
521. Lopresti
522. Lorber
523. Lord
524. Lorden
525. Lorimer
526. Lorriane
527. Lorriman
528. Lort-Phillips
529. Lort-Williams
530. Loryman
531. Lorys
532. Loseby
533. Losonczi
534. Lott
535. Lough
536. Loughenbury
537. Lougher
538. Loughlin
539. Loughton
540. Lovat-Fraser
541. Lovatt
542. Love
543. Lovebucket
544. Loveday
545. Lovel
546. Lovell
547. Loveluck-Edwards
548. Loveridge
549. Lovering
550. Loverseed
551. Loveys
552. Lovill
553. Low
554. Lowe
555. Lowell
556. Lower
557. Lowery
558. Lowings
559. Lowis
560. Lowles
561. Lowndes
562. Lownie
563. Lowry
564. Lowry-Corry
565. Lowth
566. Lowther
567. Lowthian
568. Lowthion
569. Loyd
570. Loyden
571. Loyd-Lindsay
572. Loynes
573. Luard
574. Lubbock
575. Lucas
576. Lucas-Scudamore
577. Lucas-Shadwell
578. Lucas-Smith
579. Lucas-Tooth
580. Lucaws
581. Luce
582. Lucker
583. Luckey
584. Luckhurst
585. Luckhurst-Matthews
586. Luckman
587. Lucraft
588. Luder
589. Ludford
590. Ludlow
591. Luesby
592. Luff
593. Lugg
594. Luk
595. Luke
596. Lukehurst
597. Luker
598. Lukic
599. Lukins
600. Lulcahy
601. Lumb
602. Lumby
603. Lumley
604. Lumley-Savile
605. Lumsden
606. Lundgren
607. Lundon
608. Lunn
609. Lunnon
610. Lunt
611. Lupson-Darnell
612. Lupton
613. Lury
614. Luscombe
615. Lush
616. Lushington
617. Lush-Wilson
618. Lusk
619. Lustig
620. Luton
621. Luttrell
622. Lutwyche
623. Luxmoore
624. Luxon
625. Luxton
626. Lyall
627. Lyburn
628. Lycett
629. Lyden
630. Lyden-Cowan
631. Lyell
632. Lygon
633. Lyle
634. Lyle-Samuel
635. Lymington
636. Lyn
637. Lynam
638. Lynch
639. Lyne
640. Lyne-Stephens
641. Lynn
642. Lynne
643. Lyon
644. Lyons
645. Lyons-Montgomery
646. Lysley
647. Lyster
648. Lythgoe
649. Lyttelton
650. Lytton-Bernard
651. Lytton-Cobbold
652. Lyven
653. Lywood