How Many People Are Named Marilou Brown?
There are approximately 7 people named Marilou Brown living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 48,964,905 Americans.
This estimate combines SSA birth records for the first name Marilou 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 background data where it is available.
Estimated People with This Name
7
1 in 48,964,905 Americans
Combination Rarity
Very Rare
First Name
View full profileMarilou
Last Name
View full profileBrown
Marilou: Popularity Over Time
Year-by-year SSA birth registrations for the first name Marilou. The peak year was 1948 with 90 births. The average person named Marilou today is 64 years old.
Ancestry of the First Name Marilou
In the 2020 Census, the first name Marilou was most commonly recorded among people who identified as Asian and Pacific Islander (61.92%). The next largest recorded groups were White (29.91%) and Hispanic (6.36%).
These percentages describe the people who had the first name Marilou in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.
Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Marilou rose or fell over time.
Ancestry of the Brown Surname
The surname Brown was most commonly recorded among people who identified as White in the 2020 Census.
This is a self-reported race and ethnicity breakdown for people who had the surname Brown in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.
How we calculated this
The first name "Marilou" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Brown" appears at a rate of 463.73 per 100,000 people in the 2020 U.S. Census.
We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Marilou are likely to be alive now.
Multiplying these frequencies against the U.S. population of ~343 million gives 7 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Marilou
Other people with the surname Brown
Marilou Brown: Questions and Answers
How many people are named Marilou Brown?
We estimate approximately 7 people named Marilou Brown are alive in the United States today. The first name Marilou is shared by 1,588 Americans, and the surname Brown is shared by 1,589,457.
How rare is the name Marilou Brown?
This name combination is classified as Very Rare, occurring at a rate of about 1 in 48,964,905 Americans. The first name Marilou is rare and the surname Brown is very common.
Is Marilou a male or female name?
Marilou is predominantly female, with 0.0% of bearers being male and 100.0% female. It peaked in popularity in 1948 and the average bearer today is 64 years old.
What does the Census say about the first name Marilou?
In the 2020 Census, the first name Marilou was most commonly recorded among people who identified as Asian and Pacific Islander (61.92%). The next largest recorded groups were White (29.91%) and Hispanic (6.36%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.
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. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.
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