Brett Sullivan
There are approximately 114 people named Brett Sullivan living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 3,006,617 Americans.
This estimate combines SSA birth records for the first name Brett with Census Bureau frequency data for the surname Sullivan. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
114
1 in 3,006,617
Named Brett
152K
Alive today
Named Sullivan
257K
Alive today
US population
343M
Denominator
Estimated living: 152K
Rarity: Common
Gender: Male
Peak year: 1986
Average age: 42
Estimated bearers: 257K
Rarity: Common
Census rank: #105
Per 100K: 74.92
Top ancestry: White (87.7%)
First name trend
Brett: popularity over time
Year-by-year SSA birth registrations for the first name Brett. The peak year was 1986 with 4,906 births. The average person named Brett today is 42 years old.
Babies born per year
Ethnicity
Ancestry of the Sullivan surname
Self-reported race and ethnicity breakdown for people with the surname Sullivan, from the 2010 US Census Bureau. The largest group is White at 87.7%.
- White87.7%
- Black or African American7.1%
- Hispanic or Latino2.4%
- Two or more races1.6%
- Asian and Pacific Islander0.6%
- American Indian and Alaska Native0.6%
Methodology
How we calculated this
The first name Brett has a living-bearer frequency of 0.0442% of the US population, based on 151,534 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Sullivan appears at a rate of 74.92 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0749%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 114 people with the full name Brett Sullivan. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Brett
Related
Other people with the surname Sullivan
FAQ
Brett Sullivan: questions and answers
How many people are named Brett Sullivan?
We estimate approximately 114 people in the United States share the full name Brett Sullivan. That works out to about 1 in 3,006,617 Americans. This is calculated by combining the first-name frequency (0.0442%) with the surname frequency (74.92 per 100K) against the current US population.
How rare is the name Brett Sullivan?
We classify Brett Sullivan as "Very Rare". About 1 in 3,006,617 Americans share this exact first and last name combination.
Is Brett a male or female name?
Brett is predominantly male. Out of 162,372 total SSA registrations, 97.9% were male and 2.1% were female. See the full Brett profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.