Surnames

UK surnames beginning with O

Browse UK surnames from the 1881 census and modern surname records. Surname pages show counts, origin facts, historical distribution, maps, first-name pairings and census detail.

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#	Surname	1881 count	Modern count
1	Owen	35,558	52,359
2	Obrien	7,799	33,659
3	Oliver	21,337	31,233
4	Oneill	3,270	27,781
5	Osborne	14,203	24,541
6	Oconnor	3,030	23,629
7	Odonnell	3,098	15,455
8	Owens	14,922	15,316
9	Osullivan	503	13,584
10	Oakley	6,359	9,877
11	Oreilly	425	8,291
12	Oconnell	1,335	8,219
13	Orr	1,213	7,972
14	Ohara	2,809	7,647
15	Ogden	8,483	7,275
16	Oakes	4,336	7,022
17	Oshea	400	6,698
18	Oleary	1,157	6,221
19	Osman	1,091	6,194
20	Orourke	535	5,970
21	Oxley	4,199	5,671
22	Oldfield	4,940	5,656
23	Oates	4,568	5,602
24	Oldham	5,288	5,006
25	Osborn	6,245	4,899
26	Oneil	5,219	4,627
27	Orchard	3,164	4,388
28	Ocallaghan	232	4,224
29	Overton	2,907	4,004
30	Omalley	541	3,937
31	Otoole	300	3,905
32	Orton	2,810	3,794
33	Ohare	1,356	3,726
34	Omar	6	3,704
35	Ogilvie	2,906	3,517
36	Ogrady	489	3,487
37	Odell	2,324	3,357
38	Orme	2,506	3,297
39	Okeefe	497	3,179
40	Oram	2,337	3,062
41	Odonoghue	167	3,042
42	Okeeffe	184	2,836
43	Ord	1,786	2,804
44	Odriscoll	60	2,361
45	Ogorman	137	2,113
46	Odonovan	79	2,104
47	Owusu	0	2,104
48	Ohanlon	158	2,079
49	Ohagan	307	2,061
50	Ormerod	2,401	1,989
51	Odedra	0	1,922
52	Odwyer	91	1,890
53	Olsen	557	1,840
54	Okane	135	1,839
55	Oliveira	5	1,824
56	Oldroyd	1,515	1,820
57	Oshaughnessy	167	1,753
58	Ohalloran	132	1,710
59	Osmond	1,351	1,692
60	Onions	1,666	1,662
61	Omahony	27	1,614
62	Oloughlin	68	1,573
63	Osbourne	1,102	1,562
64	Old	1,157	1,539
65	Osei	0	1,539
66	Oregan	61	1,536
67	Openshaw	1,453	1,519
68	Oswald	1,375	1,450
69	Olley	977	1,405
70	Oddy	1,842	1,360
71	Organ	1,190	1,359
72	Olive	1,073	1,293
73	Omara	202	1,238
74	Oliphant	1,170	1,235
75	Omeara	99	1,221
76	Omahoney	19	1,197
77	Offord	948	1,189
78	Oriordan	11	1,188
79	Ofarrell	163	1,187
80	Ong	165	1,145
81	Oboyle	163	1,139
82	Ovenden	840	1,137
83	Odowd	139	1,134
84	Ogg	205	1,110
85	Ogle	958	1,105
86	Ojo	0	1,102
87	Orrell	1,117	1,094
88	Orford	749	1,087
89	Otter	759	1,058
90	Oxford	1,031	1,037
91	Omer	60	994
92	Oflaherty	116	990
93	Oke	309	975
94	Oakey	693	973
95	Orange	488	961
96	Outram	875	957
97	Opoku	0	933
98	Owers	668	911
99	Ormrod	966	906
100	Ovens	765	894