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
- 1,773,948 Historical Documents with Brennan on Ancestry
- 707,008 Birth, Marriage, and Deaths
- 415,422 Census and Voter Lists
- 84,906 Military Records
- 91,836 Immigration Records
- 474,776 Member Trees
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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.
from the New York Passengers List
Click on a place to view Brennan immigration records
The information for this chart came from the U.S. Immigration Collection at Ancestry. 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.
from the New York Passenger Lists
Click on a circle in the chart to view Brennan immigration records
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.
from the Social Security Death Index (SSDI)
Click on a circle in the chart to view Brennan birth and death records
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.
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.
- All Brennan
- 1,101
- Confederate
- 170
- Union
- 931
from the Civil War Service Records
Click to view veteran service records
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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