Riordan Family History

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Riordan Name Meaning

Irish: reduced form of O’Riordan, an Anglicized form of Gaelic Ó Ríoghbhárdáin ‘descendant of Rióghbhárdán’, a byname composed of the elements ríogh- ‘royal’ + a diminutive of bárd ‘bard’, ‘poet’.

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

Similar surnames: Lordan, O'riordan, Toran, Doran, Ronan, Corgan, Corban, Gordon

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Riordan Ethnicity Estimate

What are the common regions with the Riordan name?

These results combine data from everyone in the AncestryDNA® database with the last name Riordan. The Ancestry® ethnicity regions shown are top five most common on average for these people.

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  • Ireland & Scotland


  • England & Wales


  • Germanic Europe


  • Eastern Europe & Russia


  • France


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Riordan Family Origin

Where is the Riordan family from?

Riordan Family Occupations

What did your Riordan ancestors do for a living?

In 1880, the most common Riordan occupation in the USA was Farmer. 23% of Riordan's were Farmers. A less common occupation for the Riordan family was Carpenter. Farmer, Laborer and Keeping House were the top 3 reported jobs worked by Riordan.

View Census data for Riordan | Data not to scale

  • Farmer

  • Laborer

  • Keeping House

  • Carpenter


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

Riordan Historical Records

What Riordan family records will you find?

Census Record

There are 58,000 census records available for the last name Riordan. Like a window into their day-to-day life, Riordan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

Search 1940's US census records for Riordan

Passenger List

There are 16,000 immigration records available for the last name Riordan. Passenger lists are your ticket to knowing when your ancestors arrived in the USA, and how they made the journey - from the ship name to ports of arrival and departure.

View all Riordan immigration records

Draft Card

There are 10,000 military records available for the last name Riordan. For the veterans among your Riordan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

View all Riordan military records

You've only scratched the surface of Riordan family history.

Riordan Life Expectancy

What is the average Riordan lifespan?

Between 1945 and 2004, in the United States, Riordan life expectancy was at its lowest point in 1961, and highest in 1999. The average life expectancy for Riordan in 1945 was 54, and 71 in 2004.

View Social Security Death Index (SSDI) for Riordan

An unusually short lifespan might indicate that your Riordan 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.

Famous Riordan Family Ancestors

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