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O'reilly Family History

O'reilly Name 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.

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


Similar surnames: Reilly, O'neill, O'kelly, O'kelley, Crilly, O'berry, Reidy, O'regan

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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 1911 there were 5 O'reilly families living in Quebec. This was about 63% of all the recorded O'reilly's in Canada. Quebec had the highest population of O'reilly families in 1911.
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.

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

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

What O'reilly family records will you find?

Census Records

There are 95,000 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.

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Passenger Lists

There are 26,000 immigration records available for the last name O'reilly. 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.

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Draft Cards

There are 16,000 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.

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

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