Brennan Family History

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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

Similar surnames: Drennan, Greenan, Grennan, Bressan, Brenna, Grannan, Breihan, Brenton

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Brennan Family Origin

Where is the Brennan family from?

Brennan Family Occupations

What did your Brennan ancestors do for a living?

In 1940, Laborer and Stenographer were the top reported jobs for men and women in the US named Brennan. 11% of Brennan men worked as a Laborer and 8% of Brennan women worked as a Stenographer. Some less common occupations for Americans named Brennan were Farmer and Secretary

View Census data for Brennan | Data not to scale

Top Male Occupations in 1940

  • Laborer
  • Salesman
  • Clerk
  • Farmer

Top Female Occupations in 1940

  • Stenographer
  • Teacher
  • Clerk
  • Secretary

*We display top occupations by gender to maintain their historical accuracy during times when men and women often performed different jobs.

Brennan Historical Records

What Brennan family records will you find?

Census Record

There are 378,000 census records available for the last name Brennan. Like a window into their day-to-day life, Brennan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

Search US census records for Brennan

Passenger List

There are 82,000 immigration records available for the last name Brennan. 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.

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Draft Card

There are 69,000 military records available for the last name Brennan. For the veterans among your Brennan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

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

Brennan Life Expectancy

What is the average Brennan lifespan?

Between 1940 and 2004, in the United States, Brennan life expectancy was at its lowest point in 1945, and highest in 2001. The average life expectancy for Brennan in 1940 was 40, and 74 in 2004.

View Social Security Death Index (SSDI) for Brennan

Famous Brennan Family Ancestors

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