O Sullivan Name Origin, Meaning and Family History

Discover how your O Sullivan ancestors earned their living and spread across the country. Find out more about your family history by using the Free Search box.

Surname Distribution

Census frequency by county

Name Concentrations Within England and Wales

O Sullivan Surname Statistics


Top Professions for the O Sullivan family

Profession Census Frequency
Labourer 2
Clerk 1
Student 1

O Sullivan Surname Variants Ranking

Rank Surname Match Census Frequency
1 O Brien 40% 4,889
2 O Neill 30% 2,288
3 O Connor 20% 2,195
4 O Neil 30% 2,053
5 O Donnell 20% 1,424
6 O Hara 30% 1,225
7 O Brian 50% 1,034
8 O Connell 20% 829
9 O' Brien 30% 734
10 O Hare 20% 666
11 O Leary 30% 566
12 O Neal 30% 407
13 O Niel 30% 386
14 O Conner 20% 382
15 O' Neill 20% 368
16 O Sullivan 100% 300
17 O Shea 40% 299
18 O Malley 40% 296
19 O Reilly 30% 286
20 O' Connor 10% 277
21 O Grady 20% 249
22 O' Hara 20% 249
23 O' Neil 20% 249
24 O Rourke 20% 228
25 O Bryan 40% 223
26 O Keefe 20% 214
27 O' Donnell 10% 206
28 O Toole 30% 180
29 O Donald 20% 163
30 O Keeffe 20% 150
31 O Donoghue 20% 140
32 O' Brian 40% 130
33 O Niell 30% 128
34 O' Connell 10% 128
35 O Callaghan 55% 123
36 O Dell 40% 115
37 Morris 20% 114
38 O Boyle 30% 114
39 O Hanlon 40% 111
40 Owe 10% 105
41 O' Leary 20% 104
42 O Hagan 40% 100

Did you know?

The surname O Sullivan is the 16th most popular variant of O Brien.

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