Sion Roy
There are approximately 1 people named Sion Roy 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 Sion with Census Bureau frequency data for the surname Roy. 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 Sion
813
Alive today
Named Roy
62K
Alive today
US population
343M
Denominator
Estimated living: 813
Rarity: Very Rare
Gender: Unisex
Peak year: 2022
Average age: 17
Top Census group: White (33.0%)
Estimated bearers: 62K
Rarity: Uncommon
Census rank: #606
Per 100K: 18.10
Top ancestry: White (68.6%)
First name trend
Sion: popularity over time
Year-by-year SSA birth registrations for the first name Sion. The peak year was 2022 with 48 births. The average person named Sion today is 17 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Sion
Self-reported race and ethnicity breakdown for people with the first name Sion, from the 2020 US Census Bureau first-name tables. The largest published group is White at 33.0%.
The bar chart below shows how people with the first name Sion 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 Sion at the time of the Census. A first name does not determine a person's race or ethnicity.
- White33.0% · 323
- Black or African American27.2% · 267
- Asian and Pacific Islander24.0% · 235
- Hispanic or Latino10.2% · 100
- Two or more races5.6% · 55
Ethnicity
Ancestry of the Roy surname
Self-reported race and ethnicity breakdown for people with the surname Roy, from the 2020 US Census Bureau. The largest group is White at 68.6%.
The bar chart below shows how people with the surname Roy 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 Roy at the time of the Census. A surname does not determine a person's race or ethnicity.
- White68.6% · 37,122
- Asian and Pacific Islander14.6% · 7,889
- Black or African American8.1% · 4,405
- Two or more races3.9% · 2,090
- Hispanic or Latino3.3% · 1,809
- American Indian and Alaska Native1.4% · 774
Methodology
How we calculated this
The first name Sion has a living-bearer frequency of 0.0002% of the US population, based on 813 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 Sion right now.
The surname Roy appears at a rate of 18.10 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0181%.
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 Sion Roy. 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 Roy
FAQ
Sion Roy: questions and answers
How many people are named Sion Roy?
We estimate approximately 1 people in the United States share the full name Sion Roy. 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 (18.10 per 100K) against the current US population.
How rare is the name Sion Roy?
We classify Sion Roy as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Sion a male or female name?
Sion is predominantly unisex. Out of 841 total SSA registrations, 89.9% were male and 10.1% were female. See the full Sion 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 are called Sion Roy?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.