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Brennan Family History

Brennan Name Meaning
(predominantly southern) Anglicized form of Gaelic Ó Braonáin ‘descendant of Braonán’, a personal name from a diminutive of braon ‘moisture’, ‘drop’. Compare Breen.(predominantly northern) Anglicized form of Gaelic Ó Branáin ‘descendant of Branán’, a personal name meaning ‘little raven’ (see Brannigan).

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

1,334,818 Historical Documents with Brennan on Ancestry.com
483,447 Birth, Marriage, and Deaths
63,863 Military Records
74,646 Immigration Records
349,092 Census and Voter Lists
363,770 Member Trees

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Name Distribution of Brennan Families

  • Number of Brennan families
     911 - 1,819
     304 - 910
     1 - 303
     
    from the 1920 US Federal Census Data
  • Number of Brennan families
     475 - 948
     159 - 474
     1 - 158
     
    from the 1891 England and Wales Census Data
  • Number of Brennan families
     90 - 177
     31 - 89
     1 - 30
     
    from the 1891 Scotland Census Data

Brennan census records

You can see how Brennan families moved over time by selecting different Census years.

Census records can tell you little-known facts about your ancestors such as birthplace, occupation and value of personal estate.

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Brennan 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 Brennan 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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Brennan Immigration Information

from the New York Passenger Lists

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You can find out when most of the Brennan 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 Brennan

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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.

The SSDI is a searchable database of more than 70 million names. You can find birthdates, death dates, addresses and more.

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Brennan Family Occupations

from 1880 Federal Census Data

Brennan census records

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

Occupation can tell you about your ancestors' social status and economic status.

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Brennan Civil War Service Records

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You can find out if your ancestors came primarily from the North of the South.

Military records can tell you an ancestor's birthplace, occupation, and even physical description.

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