O'reilly Family History

O'reilly Surname Meaning

Irish: Anglicized form of Gaelic Ó Raghailligh ‘descendant of Raghailleach’, Old Irish Roghallach, a personal name of unexplained etymology.

This is the name of a chieftain family in County Cavan, related to the O’Rourkes.

Similar surnames: Reilly, Reiley, Crilly, O'kelly, O'neill, Mcneilly, O'riley, Reilley, Reily, Brill

142K	Birth, Marriage, and Deaths
16K	Military Records
26K	Immigration Records
95K	Census and Voter Lists
90K	Member Trees

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Where is the O'reilly family from?

You can see how O'reilly families moved over time by selecting different census years. The O'reilly family name was found in the USA, Canada, and Scotland between 1841 and 1920. The most O'reilly families were found in USA in 1880. In 1841 there was 1 O'reilly family living in Midlothian. This was 100% of all the recorded O'reilly's in Scotland. Midlothian had the highest population of O'reilly families in 1841.

Use census records and voter lists to see where families with the O'reilly surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.

View Census Data for O'reilly

What O'reilly family records will you find?

Census Record

There are 95K census records available for the last name O'reilly. Like a window into their day-to-day life, O'reilly census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

Search UK census records for O'reilly

Passenger List

There are 26K immigration records available for the last name O'reilly. 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'reilly immigration records

Military Records

There are 16K military records available for the last name O'reilly. For the veterans among your O'reilly ancestors, military collections provide insights into where and when they served, and even physical descriptions.

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What is the average O'reilly lifespan?

Between 1992 and 2004, in the United States, O'reilly life expectancy was at its lowest point in 1997, and highest in 1998. The average life expectancy for O'reilly in 1992 was 60, and 51 in 2004.

Discover the unique achievements of ancestors in the O'reilly family tree

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O'reilly Surname Meaning

Irish: Anglicized form of Gaelic Ó Raghailligh ‘descendant of Raghailleach’, Old Irish Roghallach, a personal name of unexplained etymology.

This is the name of a chieftain family in County Cavan, related to the O’Rourkes.

Where is the O'reilly family from?

What O'reilly family records will you find?

What is the average O'reilly lifespan?

Between 1992 and 2004, in the United States, O'reilly life expectancy was at its lowest point in 1997, and highest in 1998. The average life expectancy for O'reilly in 1992 was 60, and 51 in 2004.

O'reilly Family History

O'reilly Surname Meaning

371,000 record(s) for O'reilly

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

Where is the O'reilly family from?

What O'reilly family records will you find?

Census Record

Passenger List

Military Records

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

What is the average O'reilly lifespan?

Discover the unique achievements of ancestors in the O'reilly family tree

Search for another surname

O'reilly Surname Meaning

371,000 record(s) for O'reilly

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

Where is the O'reilly family from?

What O'reilly family records will you find?

Census Record

Passenger List

Military Records

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

What is the average O'reilly lifespan?

Discover the unique achievements of ancestors in the O'reilly family tree

Search for another surname