Ysidoro Perez
There are approximately 1 people named Ysidoro Perez 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 Ysidoro with Census Bureau frequency data for the surname Perez. 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 Ysidoro
6
Alive today
Named Perez
781K
Alive today
US population
343M
Denominator
Estimated living: 6
Rarity: Very Rare
Gender: Male
Peak year: 1929
Average age: 73
Top Census group: Hispanic or Latino (95.6%)
Estimated bearers: 781K
Rarity: Very Common
Census rank: #21
Per 100K: 227.74
Top ancestry: Hispanic (92.2%)
First name trend
Ysidoro: popularity over time
Year-by-year SSA birth registrations for the first name Ysidoro. The peak year was 1929 with 7 births. The average person named Ysidoro today is 73 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Ysidoro
Self-reported race and ethnicity breakdown for people with the first name Ysidoro, from the 2020 US Census Bureau first-name tables. The largest published group is Hispanic or Latino at 95.6%.
The bar chart below shows how people with the first name Ysidoro 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 Ysidoro at the time of the Census. A first name does not determine a person's race or ethnicity.
- Hispanic or Latino95.6% · 108
- Asian and Pacific Islander2.7% · 3
- White1.8% · 2
Ethnicity
Ancestry of the Perez surname
Self-reported race and ethnicity breakdown for people with the surname Perez, from the 2020 US Census Bureau. The largest group is Hispanic at 92.2%.
The bar chart below shows how people with the surname Perez 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 Perez at the time of the Census. A surname does not determine a person's race or ethnicity.
- Hispanic or Latino92.2% · 627,672
- White5.2% · 35,730
- Asian and Pacific Islander1.4% · 9,325
- Black or African American0.6% · 3,825
- Two or more races0.4% · 2,570
- American Indian and Alaska Native0.2% · 1,590
Methodology
How we calculated this
The first name Ysidoro has a living-bearer frequency of 0.0000% of the US population, based on 6 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 Ysidoro right now.
The surname Perez appears at a rate of 227.74 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.2277%.
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 Ysidoro Perez. 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 Perez
FAQ
Ysidoro Perez: questions and answers
How many people are named Ysidoro Perez?
We estimate approximately 1 people in the United States share the full name Ysidoro Perez. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0000%) with the surname frequency (227.74 per 100K) against the current US population.
How rare is the name Ysidoro Perez?
We classify Ysidoro Perez as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Ysidoro a male or female name?
Ysidoro is predominantly male. Out of 35 total SSA registrations, 100.0% were male and 0.0% were female. See the full Ysidoro 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 Ysidoro Perez?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.