Caspian Duke
There are approximately 1 people named Caspian Duke living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 342,754,338 Americans.
This estimate combines SSA birth records for the first name Caspian with Census Bureau frequency data for the surname Duke. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
1
1 in 342,754,338
Named Caspian
3.5K
Alive today
Named Duke
38K
Alive today
US population
343M
Denominator
Estimated living: 3.5K
Rarity: Rare
Gender: Male
Peak year: 2024
Average age: 7
Top Census group: White (65.0%)
Estimated bearers: 38K
Rarity: Uncommon
Census rank: #1,036
Per 100K: 11.15
Top ancestry: White (82.7%)
First name trend
Caspian: popularity over time
Year-by-year SSA birth registrations for the first name Caspian. The peak year was 2024 with 492 births. The average person named Caspian today is 7 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Caspian
Self-reported race and ethnicity breakdown for people with the first name Caspian, from the 2020 US Census Bureau first-name tables. The largest published group is White at 65.0%.
The bar chart below shows how people with the first name Caspian 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 Caspian at the time of the Census. A first name does not determine a person's race or ethnicity.
- White65.0% · 1,020
- Hispanic or Latino17.6% · 276
- Two or more races10.8% · 170
- Asian and Pacific Islander3.0% · 47
- Black or African American2.7% · 43
- American Indian and Alaska Native0.8% · 13
Ethnicity
Ancestry of the Duke surname
Self-reported race and ethnicity breakdown for people with the surname Duke, from the 2020 US Census Bureau. The largest group is White at 82.7%.
The bar chart below shows how people with the surname Duke 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 Duke at the time of the Census. A surname does not determine a person's race or ethnicity.
- White82.7% · 27,547
- Black or African American7.6% · 2,540
- Hispanic or Latino4.2% · 1,409
- Two or more races4.1% · 1,374
- Asian and Pacific Islander0.8% · 281
- American Indian and Alaska Native0.5% · 173
Methodology
How we calculated this
The first name Caspian has a living-bearer frequency of 0.0010% of the US population, based on 3,533 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 Caspian right now.
The surname Duke appears at a rate of 11.15 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0111%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 1 people with the full name Caspian Duke. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Caspian
Related
Other people with the surname Duke
FAQ
Caspian Duke: questions and answers
How many people are named Caspian Duke?
We estimate approximately 1 people in the United States share the full name Caspian Duke. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0010%) with the surname frequency (11.15 per 100K) against the current US population.
How rare is the name Caspian Duke?
We classify Caspian Duke as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Caspian a male or female name?
Caspian is predominantly male. Out of 3,558 total SSA registrations, 99.9% were male and 0.1% were female. See the full Caspian 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 Caspian Duke?
Find out how many people are called Caspian Duke on our sister site HowManyOfMe.org — a quick modern estimate with the living-bearer count front and centre.