Rosalyn Brown
There are approximately 72 people named Rosalyn Brown living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 4,760,477 Americans.
This estimate combines SSA birth records for the first name Rosalyn with Census Bureau frequency data for the surname Brown. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
72
1 in 4,760,477
Named Rosalyn
16K
Alive today
Named Brown
1.6M
Alive today
US population
343M
Denominator
Estimated living: 16K
Rarity: Uncommon
Gender: Female
Peak year: 1955
Average age: 45
Top Census group: White (42.9%)
Estimated bearers: 1.6M
Rarity: Very Common
Census rank: #4
Per 100K: 463.73
Top ancestry: White (55.4%)
First name trend
Rosalyn: popularity over time
Year-by-year SSA birth registrations for the first name Rosalyn. The peak year was 1955 with 422 births. The average person named Rosalyn today is 45 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Rosalyn
Self-reported race and ethnicity breakdown for people with the first name Rosalyn, from the 2020 US Census Bureau first-name tables. The largest published group is White at 42.9%.
The bar chart below shows how people with the first name Rosalyn described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the name Rosalyn at the time of the Census. A first name does not determine a person's race or ethnicity.
- White42.9% · 6,817
- Black or African American34.9% · 5,554
- Hispanic or Latino12.7% · 2,025
- Asian and Pacific Islander5.8% · 917
- Two or more races2.9% · 467
- American Indian and Alaska Native0.8% · 127
Ethnicity
Ancestry of the Brown surname
Self-reported race and ethnicity breakdown for people with the surname Brown, from the 2020 US Census Bureau. The largest group is White at 55.4%.
The bar chart below shows how people with the surname Brown described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the surname Brown at the time of the Census. A surname does not determine a person's race or ethnicity.
- White55.4% · 768,332
- Black or African American34.7% · 480,749
- Two or more races4.8% · 66,938
- Hispanic or Latino3.5% · 49,166
- American Indian and Alaska Native0.8% · 11,738
- Asian and Pacific Islander0.7% · 9,160
Methodology
How we calculated this
The first name Rosalyn has a living-bearer frequency of 0.0046% of the US population, based on 15,618 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
Even though the Census Bureau now publishes first-name tables, we do not use that file as the main first-name input for this estimate. The latest first-name Census snapshot is from 2020, which makes it 6 years old today. Because Census first-name data is only released once every 10 years, SSA birth records plus CDC survival rates give a better current estimate of how many people are likely alive with the name Rosalyn right now.
The surname Brown appears at a rate of 463.73 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.4637%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 72 people with the full name Rosalyn Brown. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Rosalyn
Related
Other people with the surname Brown
FAQ
Rosalyn Brown: questions and answers
How many people are named Rosalyn Brown?
We estimate approximately 72 people in the United States share the full name Rosalyn Brown. That works out to about 1 in 4,760,477 Americans. This is calculated by combining the first-name frequency (0.0046%) with the surname frequency (463.73 per 100K) against the current US population.
How rare is the name Rosalyn Brown?
We classify Rosalyn Brown as "Very Rare". About 1 in 4,760,477 Americans share this exact first and last name combination.
Is Rosalyn a male or female name?
Rosalyn is predominantly female. Out of 23,040 total SSA registrations, 0.0% were male and 100.0% were female. See the full Rosalyn 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 2020 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.
How many people have the full name Rosalyn Brown?
For a quick modern take, check how common the name Rosalyn Brown is on our sister site HowManyOfMe.org.