2000
#116,835
National surname rank
Recorded bearers 138
First available Census row
Per 100,000 0.05
Very Rare Last name
Iulo
A surname indicating the person or family was named after a placename.
According to the 2020 US Census Bureau surname tables, roughly 127 Americans carry the last name Iulo. That puts it at #148,665 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,698,853 residents).
This page is the full Name Census profile for the Iulo surname. You will find the Census Bureau frequency data, a multi-census history view, an ancestry and ethnicity breakdown based on self-reported demographics, the name's meaning and origin where available, and answers to the most common questions people ask about this surname.
Bearers in the US
127
1 in 2,698,853
Census rank
#148,665
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
111
very rare in the US
Popularity narrative
The Census Bureau recorded 111 bearers of the surname Iulo in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 148665th position in the national surname ranking.
Among Census respondents with the surname Iulo, the largest self-reported group is White at 90.1%. The next largest groups are Hispanic (8.1%) and American Indian/Alaska Native (1.8%).
Origin
Meaning and origin of Iulo
The surname IULO has its origins in Italy, dating back to the medieval period, around the 12th century. It is believed to have originated from the Latin word "iulus," which means "a small plant" or "a catkin." This suggests that the name may have initially been used as a descriptive surname for someone who lived near or worked with plants or vegetation.
One of the earliest recorded instances of the name IULO can be found in a document from the city of Genoa, Italy, dated around 1250. This document mentions a person named Giovanni Iulo, who was a merchant involved in the trade of spices and textiles. The name IULO is also mentioned in several other historical records from various regions of Italy, including Tuscany, Lombardy, and Naples.
During the Renaissance period, the name IULO gained some prominence in literary circles. In the 16th century, there was a poet and scholar named Pietro Iulo, who was born in Naples in 1520 and died in 1598. He is known for his works in Italian and Latin, including a collection of poems titled "Rime Toscane."
In the 18th century, there was a notable artist from Rome named Domenico Iulo, who was born in 1725 and died in 1802. He was a painter and engraver, known for his portraits and religious works. Some of his paintings can be found in churches and museums across Italy.
Another notable figure with the surname IULO was Francesco Iulo, a military leader from Naples who lived in the early 19th century. He played a significant role in the Napoleonic Wars and was awarded the title of Baron for his service.
In the late 19th century, a man named Giuseppe Iulo from Sicily made a name for himself as a successful businessman and philanthropist. He established several charitable foundations and contributed significantly to the development of his hometown.
While the surname IULO is not as common as some other Italian surnames, it has persisted throughout the centuries and can be found in various regions of Italy, as well as among Italian diaspora communities around the world.
Demographics
Ancestry and ethnicity for Iulo
Among Census respondents with the surname Iulo, the largest self-reported group is White at 90.1%. The next largest groups are Hispanic (8.1%) and American Indian/Alaska Native (1.8%).
The bar chart below shows how Iulo bearers 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 surname, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown for every Census year so the breakdown stays comparable over time. When the source file also includes raw headcounts, Name Census shows those alongside the percentages in the legend.
Keep in mind that these are self-reported numbers. A person's surname does not determine their race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the Iulo surname at the time of the 2020 Census, not any inherent property of the name itself.
- White90.1% · 100
- Hispanic or Latino8.1% · 9
- American Indian and Alaska Native1.8% · 2
Timeline
Historical Census data for Iulo
Iulo appears in 3 published Census surname files: 2000, 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2010
#125,282
National surname rank
Recorded bearers 137
-1 bearers (-0.7%)
Per 100,000 0.05
Rank movement Down 8,447 places
2020
#148,665
National surname rank
Recorded bearers 111
-26 bearers (-19.0%)
Per 100,000 0.04
Rank movement Down 23,383 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #116,835 | 138 | 0.05 | First available Census row | First available Census row |
| 2010 | #125,282 | 137 | 0.05 | -1 bearers (-0.7%) | Down 8,447 places |
| 2020 | #148,665 | 111 | 0.04 | -26 bearers (-19.0%) | Down 23,383 places |
For 2020, the Census Bureau published race and Hispanic-origin columns as counts rather than percentages. Name Census converts those counts back into shares so the ancestry section stays comparable with the older surname files.
Year on year
2010 vs 2020 Census
How has the Iulo surname changed between Census years? The chart shows bearer count side by side, and the table compares rank, count, and frequency.
Census year comparison
20102020
| Metric | 2010 | 2020 | Change |
|---|---|---|---|
| Rank | #125,282 | #148,665 | -18.7% |
| Count | 137 | 111 | -19.0% |
| Per 100K | 0.05 | 0.04 | -25.7% |
Between the 2010 and 2020 Census, the number of Iulo bearers went from 137 to 111 (-19.0% change). The surname moved down 23,383 positions in the national ranking, going from #125,282 to #148,665.
FAQ
Iulo surname: questions and answers
How many people in the U.S. have the surname Iulo?
Name Census estimates that about 127 living Americans carry the surname Iulo. Using the current population baseline, that works out to roughly 1 in 2,698,853 residents.
How common is Iulo?
Iulo ranks #148,665 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 per 100,000 residents, which is about 0 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 111 people with the surname Iulo. That is different from the site's living-bearer estimate (127), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 0 of them to have the surname Iulo.
Has Iulo become more or less common over time?
Between 2010 and 2020, the surname Iulo went from 137 recorded bearers to 111. That is a decrease of 26 (-19.0%). In the national ranking it fell from #125,282 to #148,665.
What does the Census say about the background of Iulo?
Among Census respondents with the surname Iulo, the largest self-reported group is White at 90.1%. The next largest groups are Hispanic (8.1%) and American Indian/Alaska Native (1.8%). These figures come from the 2020 Census Bureau surname tables, based on how respondents described their own race and ethnicity.
Which group reports this surname most often?
White is the largest self-reported group for the surname Iulo in the 2020 Census, accounting for 90.1% (100 people in the source table).
What is the full ancestry breakdown?
Iulo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (90.1%), Hispanic (8.1%), American Indian/Alaska Native (1.8%). For 2020, the source file also published raw headcounts for each group, which is why this page can show both percentages and counts in the ancestry section.
Is this page using the latest Census data?
Yes. This page is using the latest surname file currently loaded on Name Census, which is 2020. The historical section above also keeps any older Census surname entries we have for Iulo (2000, 2010, 2020).
Does the Census include every surname?
No. The Census Bureau only publishes surnames that appeared at least 100 times in a given decennial Census. That means very rare surnames are excluded entirely, and a surname can appear in one Census release but disappear from a later one if it falls below the reporting threshold.
Why don't the ancestry percentages always add up to exactly 100%?
There are two main reasons: rounding and suppression. The Census Bureau rounds published values, and it may suppress very small cells to protect privacy. For 2020, the Bureau also published raw group counts rather than direct percentages, so Name Census converts those counts back into shares for comparability across census years.
What does Iulo mean?
A surname indicating the person or family was named after a placename. The fuller origin note on this page goes into more detail.
Where does the surname data come from?
All surname statistics on Name Census are drawn from the US Census Bureau's decennial surname frequency tables. These files list every surname that appeared 100 or more times in the 2020 Census, along with a count, a per-100,000 rate, and a self-reported demographic breakdown. You can read the full explanation on our methodology page.
How does Name Census estimate living bearers?
For surnames, Name Census does not age cohorts the way it does for first names. Instead, it takes the Census Bureau's published frequency for Iulo (0.04 per 100,000) and applies that rate to the current U.S. resident population to estimate how many living Americans have the surname today.
How many people are called Iulo?
You can see how many Americans have the surname Iulo on our sister site HowManyOfMe.org — same data roots, lighter UI.