Sirius Black
There are approximately 1 people named Sirius Black 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 Sirius with Census Bureau frequency data for the surname Black. 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 Sirius
689
Alive today
Named Black
180K
Alive today
US population
343M
Denominator
Estimated living: 689
Rarity: Very Rare
Gender: Male
Peak year: 2022
Average age: 10
Estimated bearers: 180K
Rarity: Common
Census rank: #174
Per 100K: 52.46
Top ancestry: White (74.6%)
First name trend
Sirius: popularity over time
Year-by-year SSA birth registrations for the first name Sirius. The peak year was 2022 with 61 births. The average person named Sirius today is 10 years old.
Babies born per year
Ethnicity
Ancestry of the Black surname
Self-reported race and ethnicity breakdown for people with the surname Black, from the 2010 US Census Bureau. The largest group is White at 74.6%.
- White74.6%
- Black or African American19.0%
- Hispanic or Latino2.3%
- Two or more races2.1%
- American Indian and Alaska Native1.4%
- Asian and Pacific Islander0.5%
Methodology
How we calculated this
The first name Sirius has a living-bearer frequency of 0.0002% of the US population, based on 689 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Black appears at a rate of 52.46 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0525%.
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 Sirius Black. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people with the surname Black
FAQ
Sirius Black: questions and answers
How many people are named Sirius Black?
We estimate approximately 1 people in the United States share the full name Sirius Black. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0002%) with the surname frequency (52.46 per 100K) against the current US population.
How rare is the name Sirius Black?
We classify Sirius Black as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Sirius a male or female name?
Sirius is predominantly male. Out of 694 total SSA registrations, 99.3% were male and 0.7% were female. See the full Sirius 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.