Keir Dullea
There are approximately 1 people named Keir Dullea 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 Keir with Census Bureau frequency data for the surname Dullea. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
1
1 in 342,754,338
Named Keir
1.1K
Alive today
Named Dullea
548
Alive today
US population
343M
Denominator
Estimated living: 1.1K
Rarity: Rare
Gender: Male
Peak year: 1970
Average age: 36
Estimated bearers: 548
Rarity: Very Rare
Census rank: #45,495
Per 100K: 0.16
Top ancestry: White (96.0%)
First name trend
Keir: popularity over time
Year-by-year SSA birth registrations for the first name Keir. The peak year was 1970 with 74 births. The average person named Keir today is 36 years old.
Babies born per year
Ethnicity
Ancestry of the Dullea surname
Self-reported race and ethnicity breakdown for people with the surname Dullea, from the 2010 US Census Bureau. The largest group is White at 96.0%.
- White96.0%
- Two or more races1.9%
- Unknown or suppressed1.1%
- Hispanic or Latino1.1%
Methodology
How we calculated this
The first name Keir has a living-bearer frequency of 0.0003% of the US population, based on 1,052 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Dullea appears at a rate of 0.16 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0002%.
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 Keir Dullea. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
FAQ
Keir Dullea: questions and answers
How many people are named Keir Dullea?
We estimate approximately 1 people in the United States share the full name Keir Dullea. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0003%) with the surname frequency (0.16 per 100K) against the current US population.
How rare is the name Keir Dullea?
We classify Keir Dullea as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Keir a male or female name?
Keir is predominantly male. Out of 1,110 total SSA registrations, 94.2% were male and 5.8% were female. See the full Keir 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.