Don Roos
There are approximately 1 people named Don Roos 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 Don with Census Bureau frequency data for the surname Roos. 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 Don
87K
Alive today
Named Roos
5.9K
Alive today
US population
343M
Denominator
Estimated living: 87K
Rarity: Uncommon
Gender: Male
Peak year: 1946
Average age: 67
Estimated bearers: 5.9K
Rarity: Rare
Census rank: #6,690
Per 100K: 1.71
Top ancestry: White (93.4%)
First name trend
Don: popularity over time
Year-by-year SSA birth registrations for the first name Don. The peak year was 1946 with 4,131 births. The average person named Don today is 67 years old.
Babies born per year
Ethnicity
Ancestry of the Roos surname
Self-reported race and ethnicity breakdown for people with the surname Roos, from the 2010 US Census Bureau. The largest group is White at 93.4%.
- White93.4%
- Hispanic or Latino2.3%
- Two or more races1.5%
- Black or African American1.3%
- Asian and Pacific Islander1.2%
- American Indian and Alaska Native0.2%
Methodology
How we calculated this
The first name Don has a living-bearer frequency of 0.0254% of the US population, based on 87,116 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Roos appears at a rate of 1.71 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0017%.
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 Don Roos. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Don
FAQ
Don Roos: questions and answers
How many people are named Don Roos?
We estimate approximately 1 people in the United States share the full name Don Roos. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0254%) with the surname frequency (1.71 per 100K) against the current US population.
How rare is the name Don Roos?
We classify Don Roos as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Don a male or female name?
Don is predominantly male. Out of 168,745 total SSA registrations, 99.3% were male and 0.7% were female. See the full Don 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.