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O'hallahan Family History

O'hallahan Surname Meaning

Historically, surnames evolved as a way to sort people into groups - by occupation, place of origin, clan affiliation, patronage, parentage, adoption, and even physical characteristics (like red hair). Many of the modern surnames in the dictionary can be traced back to Britain and Ireland.


Similar surnames: Hallahan, O'callahan, Callahan, O'callaghan, O'halloran, Gallahan

Search for a relative to learn more about your family history.

Hint: Try searching for a relative alive in 1940.

Where is the O'hallahan family from?

You can see how O'hallahan families moved over time by selecting different census years. The O'hallahan family name was found in the USA in 1880. In 1880 there was 1 O'hallahan family living in Illinois. This was about 33% of all the recorded O'hallahan's in USA. Illinois and 2 other states had the highest population of O'hallahan families in 1880.
Use census records and voter lists to see where families with the O'hallahan 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'hallahan family records will you find?

Census Records

There are 117 census records available for the last name O'hallahan. Like a window into their day-to-day life, O'hallahan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

Search Canadian census records for O'hallahan

Passenger Lists

There are 13 immigration records available for the last name O'hallahan. Passenger lists are your ticket to knowing when your ancestors arrived in Canada, and how they made the journey - from the ship name to ports of arrival and departure.

View all O'hallahan immigration records

Draft Cards

There are 28 military records available for the last name O'hallahan. For the veterans among your O'hallahan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

View all O'hallahan military records

You've only scratched the surface of O'hallahan family history

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What is the average O'hallahan lifespan?

An unusually short lifespan might indicate that your O'hallahan 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.

Social Security Death Index (SSDI) for O'hallahan

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