How Many People Are Named Brian Dennehy?
There are approximately 6 people named Brian Dennehy living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 57,125,723 Americans.
This estimate combines SSA birth records for the first name Brian with Census Bureau frequency data for the surname Dennehy. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
6
1 in 57,125,723 Americans
Combination Rarity
Very Rare
First Name
View full profileBrian
Last Name
View full profileDennehy
Brian: Popularity Over Time
Year-by-year SSA birth registrations for the first name Brian. The peak year was 1972 with 36,480 births. The average person named Brian today is 48 years old.
Ancestry of the Dennehy Surname
Self-reported race and ethnicity breakdown for people with the surname Dennehy, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Brian" has an estimated frequency of 0.310% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Dennehy" appears at a rate of 0.59 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 6 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Brian
Other people with the surname Dennehy
Brian Dennehy: Questions and Answers
How many people are named Brian Dennehy?
We estimate approximately 6 people named Brian Dennehy are alive in the United States today. The first name Brian is shared by 1,062,624 Americans, and the surname Dennehy is shared by 2,022.
How rare is the name Brian Dennehy?
This name combination is classified as Very Rare, occurring at a rate of about 1 in 57,125,723 Americans. The first name Brian is very common and the surname Dennehy is rare.
Is Brian a male or female name?
Brian is predominantly male, with 99.6% of bearers being male and 0.4% female. It peaked in popularity in 1972 and the average bearer today is 48 years old.
Where does this data come from?
First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. Surname data comes from the 2010 U.S. Census Bureau. Full methodology.
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