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O'sullivan Family History

O'sullivan Surname Meaning

Irish (Munster): Anglicized form of Gaelic Ó Súileabháin ‘descendant of Súileabháin’ (see Sullivan).

Source: Dictionary of American Family Names ©2013, Oxford University Press


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Where is the O'sullivan family from?

You can see how O'sullivan families moved over time by selecting different census years. The O'sullivan family name was found in the USA, the UK, Canada, and Scotland between 1861 and 1920. The most O'sullivan families were found in USA in 1880. In 1891 there were 8 O'sullivan families living in London. This was 100% of all the recorded O'sullivan's in United Kingdom. London had the highest population of O'sullivan families in 1891.
Use census records and voter lists to see where families with the O'sullivan surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.
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What O'sullivan family records will you find?

Census Records

There are 139,000 census records available for the last name O'sullivan. Like a window into their day-to-day life, O'sullivan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

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Passenger Lists

There are 42,000 immigration records available for the last name O'sullivan. Passenger lists are your ticket to knowing when your ancestors arrived in the UK, and how they made the journey - from the ship name to ports of arrival and departure.

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Draft Cards

There are 14,000 military records available for the last name O'sullivan. For the veterans among your O'sullivan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

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What is the average O'sullivan lifespan?

Between 1992 and 2004, in the United States, O'sullivan life expectancy was at its lowest point in 1998, and highest in 1997. The average life expectancy for O'sullivan in 1992 was 23, and 68 in 2004.

View Social Security Death Index (SSDI) for O'sullivan

An unusually short lifespan might indicate that your O'sullivan ancestors lived in harsh conditions. A short lifespan might also indicate health problems that were once prevalent in your family. The SSDI is a searchable database of more than 70 million names. You can find birthdates, death dates, addresses and more.

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