O'callahan Family History

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O'callahan Name Meaning

Irish: Anglicized form of Gaelic Ó Ceallacháin (see Callahan).

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

Similar surnames: O'callaghan, Callahan, Callanan, Hallahan, O'halloran, O'sullivan

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O'callahan Family Origin

Where is the O'callahan family from?

O'callahan Family Occupations

What did your O'callahan ancestors do for a living?

In 1881, the most common O'callahan occupation in the UK was Paper Maker. 100% of O'callahan's were Paper Makers.

View Census data for O'callahan | Data not to scale

  • Paper Maker


Census records can tell you a lot of little known facts about your O'callahan ancestors, such as occupation. Occupation can tell you about your ancestor's social and economic status.

O'callahan Historical Records

What O'callahan family records will you find?

Census Record

There are 4,000 census records available for the last name O'callahan. Like a window into their day-to-day life, O'callahan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

Search 1891 UK census records for O'callahan

Passenger List

There are 900 immigration records available for the last name O'callahan. 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.

View all O'callahan immigration records

Draft Card

There are 744 military records available for the last name O'callahan. For the veterans among your O'callahan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

View all O'callahan military records

You've only scratched the surface of O'callahan family history.

O'callahan Life Expectancy

What is the average O'callahan lifespan?

Average O'callahan life expectancy in 2003 was 85 years. This was higher than the general public life expectancy which was 74.

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

An unusually short lifespan might indicate that your O'callahan 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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