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O'brien Family History

O'brien Name Meaning
Irish: Anglicized form of Gaelic Ó Briain ‘descendant of Brian’, a personal name probably based on the element bre- ‘hill’, with the transferred sense ‘eminence’, i.e. ‘exalted one’. See also Bryan. In Ireland there has also been some confusion with O’Byrne (see Byrne).

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

3,209,788 Historical Documents and Family Trees with O'brien on Ancestry.com
1,037,393 Birth, Marriage, and Deaths
165,423 Military Records
180,977 Immigration Records
919,425 Census and Voter Lists
906,570 Member Family Trees

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Name Distribution of O'brien Families

  • Number of O'brien families
     399 - 796
     134 - 398
     1 - 133
     
    from the 1920 US Federal Census Data
  • Number of O'brien families
     294 - 585
     99 - 293
     1 - 98
     
    from the 1891 England and Wales Census Data
  • Number of O'brien families
     235 - 468
     79 - 234
     1 - 78
     
    from the 1891 Scotland Census Data

O'brien census records

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O'brien Family Origin

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The information for this chart came from the U.S. Immigration Collection at Ancestry.com. You can find out where the majority of the O'brien families were living before they immigrated to the U.S and learn where to focus your search for foreign records.

Immigration records can tell you an ancestor's name, ship name, port of departure, port of arrival, and destination.

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O'brien Immigration Information

from the New York Passenger Lists

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You can find out when most of the O'brien families immigrated to the United States. You can focus your search to immigration records dating from that era.

Immigration records can tell you an ancestor's name, ship name, port of departure, port of arrival and destination.

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Average Life Expectancy for O'brien

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An unusually short lifespan might indicate that your ancestors lived in harsh conditions. A short lifespan might also indicate health problems that were once prevalent in your family.

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O'brien Family Occupations

from 1880 Federal Census Data

O'brien census records

Census records can offer a lot of little known facts about your O'brien ancestors, such as occupation.

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O'brien Civil War Service Records

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