Isidoro
A masculine Spanish name derived from the Greek meaning "gift of Isis".
Name Census estimates that about 893 living Americans carry the first name Isidoro. The name is used almost exclusively for boys. The average person named Isidoro today is around 47 years old, and the year with the single highest number of Isidoro births was 1929 (24 babies).
This page is the full Name Census profile for Isidoro. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
People living today
893
~ 1 in 383,823 Americans
Peak year
1929
24 babies that year
Average age
47
years old
2023 SSA rank
#8,500
Tracked since 1913
Census
Isidoro in the 2020 Census
The 2020 Census recorded 2,553 people with the first name Isidoro, which placed it at #6,321 in the published first-name tables. This is a snapshot of people who already had the name at the time of the Census.
The SSA sections elsewhere on this page answer a different question: how often parents gave the name to babies over time. The "people living today" figure on this page is different again: it is a current estimate built from SSA birth records and age-based survival rates, so the two numbers are not expected to match exactly.
2020 Census rank
#6,321
National first-name rank
People counted
2.6K
2,553 in the published race/origin table
Per 100,000
0.8
People with this name in 2020
Largest reported group
Hispanic or Latino
90.8% of people with this name
Demographics
Ancestry and ethnicity for Isidoro
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Isidoro is Hispanic at 90.8%. The next largest groups are White (5.6%) and Asian/Pacific Islander (2.8%). These figures describe the people who had the name in 2020, not any inherent property of the name itself.
The bar chart below shows how people with the first name Isidoro described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given name, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown so the breakdown is easy to read across every published category. Because the 2020 Census first-name file also includes raw headcounts for each group, Name Census can show those alongside the percentages in the legend and hover tooltip.
Keep in mind that these are self-reported numbers. A first name does not determine a person's race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the name Isidoro at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino90.8% · 2,319
- White5.6% · 143
- Asian and Pacific Islander2.8% · 72
- Black or African American0.4% · 11
- Two or more races0.2% · 5
- American Indian and Alaska Native0.1% · 3
Popularity
Isidoro: popularity over time
The SSA tracks Isidoro from the 1910s through to the 2020s, spanning 12 decades of birth certificate data. The biggest single decade for the name was the 1990s, with 157 total registrations. Usage has dropped considerably from its 1990s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Isidoro by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Isidoro during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Isidoros live
The SSA's state-level files cover 5 states and territories. Texas, California, New Mexico recorded the most babies named Isidoro, while New York, Illinois, New Mexico recorded the fewest. The average across all reporting states is about 117 registrations each.
Origin
Meaning and history of Isidoro
The name Isidoro has its origins in the Greek language and culture, dating back to ancient times. It is derived from the Greek words "isos" meaning equal and "doron" meaning gift, thus giving it the meaning of "equal gift" or "impartial gift."
In the 6th century, the name gained prominence with Saint Isidore of Seville, a scholar and Archbishop of Seville. He is widely regarded as one of the last scholars of the ancient world and played a crucial role in preserving and transmitting classical knowledge to the Middle Ages. His most notable work, the Etymologiae, was an encyclopedic collection of knowledge covering various subjects.
The name Isidoro has been borne by several notable figures throughout history. One of the earliest recorded examples is Isidore of Miletus, a Greek architect and engineer from the 6th century AD, best known for his work on the Hagia Sophia in Constantinople.
During the Middle Ages, Isidoro became a popular name across Europe, particularly in Spain and Italy. One notable bearer was Isidore the Farmer (c. 1070-1130), a Spanish peasant and farm laborer who is venerated as a saint in the Catholic Church.
In the 16th century, Isidoro Clario (1495-1555) was an Italian Dominican friar and biblical scholar who produced one of the earliest printed translations of the Bible into the Italian language.
Another notable figure was Isidore of Moscow (1438-1474), a Russian monk and icon painter who is considered a pioneer of the Moscow school of icon painting.
In the 19th century, Isidoro Maiztegui (1805-1869) was a prominent Argentine politician and diplomat who served as the Minister of Foreign Affairs and Worship for Argentina.
Throughout its history, the name Isidoro has been borne by individuals from various walks of life, including scholars, religious figures, artists, and politicians, reflecting its enduring presence across different cultures and time periods.
People
Isidoro + last name combinations
How many people share a full name with Isidoro as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with I
Other first names starting with I with a similar number of bearers.
FAQ
Isidoro: questions and answers
How many people in the U.S. are named Isidoro?
Name Census puts the figure at roughly 893 living Americans. We arrive at this by taking every SSA birth registration for Isidoro going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 383,823 US residents.
Is Isidoro a common name?
We classify Isidoro as "Very Rare". It ranks above 89.4% of all first names in the SSA dataset by living bearers. Across the full history of the data, 1,292 babies have been registered with this name.
When was Isidoro most popular?
The single biggest year for Isidoro was 1929, when 24 babies received the name. The fact that the average living Isidoro is about 47 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
How common was Isidoro in the 2020 Census?
The published 2020 Census first-name tables recorded 2,553 people with the name Isidoro, or 0.85 per 100,000 residents. That placed it at #6,321 in the national Census ranking for first names.
Why is the Census count different from the living estimate?
Because they measure different things. The Census figure is a count of people who had the name Isidoro in 2020. The living estimate aims to answer a current question instead: how many people with the name are alive today, based on SSA birth records and age-based survival rates. Since one number is a 2020 snapshot and the other is a present-day estimate, they are not expected to be identical.
What does the Census say about the gender split for Isidoro?
In the 2020 Census sex table, Isidoro appears almost entirely male. Of the 2,554 people counted with this name, 99.6% were male and only a very small share were female. The Census view is a snapshot of people living with the name in 2020, while the SSA section above tracks births across time.
What does the Census say about the background of people named Isidoro?
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Isidoro is Hispanic at 90.8%. The next largest groups are White (5.6%) and Asian/Pacific Islander (2.8%). These figures describe the people who had the name in 2020, not any inherent property of the name itself. The percentages in the chart above come from self-reported race and Hispanic-origin responses in the 2020 Census.
Which group reports the name Isidoro most often in the Census?
Hispanic is the largest reported group for people named Isidoro in the 2020 Census, accounting for 90.8% (2,319 people in the published table).
Why can the Census sex total and race total differ slightly?
The Census Bureau published separate 2020 tables for sex and for race/Hispanic origin, and the released figures can differ slightly because of privacy protection in the public files. That is why this page treats the gender section and the race/origin section as two related snapshots instead of forcing them into one identical total.
Does every first name have Census demographic data?
No. The public Census first-name release only includes names that met the Bureau's publication rules, so many rarer names in the SSA files have no Census demographic snapshot. When that happens, the SSA trend, gender history, and state sections still appear, but the 2020 Census demographic sections are omitted.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Isidoro in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Isidoro a male name?
Yes, 100.0% of people registered as Isidoro in the SSA data are male. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Isidoro still being used today?
Yes. The SSA still recorded Isidoro in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Isidoro can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
How many people have Isidoro as a first name?
If you just want to know how many people have the name Isidoro, HowManyOfMe.org gives you the headline number in one glance.