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Origins of the O'Sullivan surname

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About the O'Sullivans

We have a total number of 34573 records for people with the last name O'Sullivan.

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Delve deeper into the O'Sullivan family's history

Where do most O'Sullivans live?

In 1921, most O'Sullivans lived in London.


Census records trace your ancestors through each generation, so you can follow where your relatives lived through each decade.

Interesting facts about O'Sullivans

How common is your surname?

You have a rare surname! It's not in the top 1000 UK surnames!

We have 9,830 records for the O'Sullivan surname. The oldest one dates back to 1849.

Who were O'Sullivans most likely to marry?

O Sullivans

&

Osullivans

Our Marriage record sets tell us which families married O'Sullivans.

What are the most common O'Sullivan first names?

  • John
  • Patrick
  • Mary
  • Margaret

Our birth record sets tell us the names of O'Sullivan family members

Common jobs for O'Sullivans

Men and women often performed different types of jobs, so these are displayed by gender to maintain their historical accuracy.

Common Female occupations for O'Sullivans in 1921
Dressmaker

27

General Servant Domestic

18

Cook Domestic

17

Teacher

16

Tailoress

14

Common Male occupations for O'Sullivans in 1921
Porter

42

General Labourer

32

Tailor

29

Clerk

25

Milesman

25

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Census records provide incredible detail on names, ages, marital statuses, occupations and more.

We found over 27,000 family trees with the O'Sullivan surname

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