Sira Oneill
There are approximately 1 people named Sira Oneill 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 Sira with Census Bureau frequency data for the surname Oneill. 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 Sira
238
Alive today
Named Oneill
57K
Alive today
US population
343M
Denominator
Estimated living: 238
Rarity: Very Rare
Gender: Female
Peak year: 2016
Average age: 15
Top Census group: Hispanic or Latino (44.2%)
Estimated bearers: 57K
Rarity: Uncommon
Census rank: #673
Per 100K: 16.52
Top ancestry: White (89.8%)
First name trend
Sira: popularity over time
Year-by-year SSA birth registrations for the first name Sira. The peak year was 2016 with 15 births. The average person named Sira today is 15 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Sira
Self-reported race and ethnicity breakdown for people with the first name Sira, from the 2020 US Census Bureau first-name tables. The largest published group is Hispanic or Latino at 44.2%.
The bar chart below shows how people with the first name Sira 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 Sira at the time of the Census. A first name does not determine a person's race or ethnicity.
- Hispanic or Latino44.2% · 295
- Black or African American26.0% · 174
- White14.5% · 97
- Asian and Pacific Islander11.2% · 75
- Two or more races3.9% · 26
- American Indian and Alaska Native0.1% · 1
Ethnicity
Ancestry of the Oneill surname
Self-reported race and ethnicity breakdown for people with the surname Oneill, from the 2020 US Census Bureau. The largest group is White at 89.8%.
The bar chart below shows how people with the surname Oneill 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 Oneill at the time of the Census. A surname does not determine a person's race or ethnicity.
- White89.8% · 44,348
- Hispanic or Latino5.2% · 2,568
- Two or more races2.8% · 1,363
- Black or African American1.1% · 520
- Asian and Pacific Islander0.9% · 453
- American Indian and Alaska Native0.2% · 113
Methodology
How we calculated this
The first name Sira has a living-bearer frequency of 0.0001% of the US population, based on 238 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 Sira right now.
The surname Oneill appears at a rate of 16.52 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0165%.
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 Sira Oneill. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Sira
Related
Other people with the surname Oneill
FAQ
Sira Oneill: questions and answers
How many people are named Sira Oneill?
We estimate approximately 1 people in the United States share the full name Sira Oneill. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0001%) with the surname frequency (16.52 per 100K) against the current US population.
How rare is the name Sira Oneill?
We classify Sira Oneill as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Sira a male or female name?
Sira is predominantly female. Out of 241 total SSA registrations, 0.0% were male and 100.0% were female. See the full Sira 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 Sira Oneill?
Our sister site HowManyOfMe.org answers how many people are called Sira Oneill at a glance, with the living-bearer count up front.