2000
#52,714
National surname rank
Recorded bearers 369
First available Census row
Per 100,000 0.14
Very Rare Last name
Iacobelli
An Italian surname derived from the given name Jacob (Iacopo, Giacomo).
According to the 2020 US Census Bureau surname tables, roughly 417 Americans carry the last name Iacobelli. That puts it at #59,889 in the national surname ranking, appearing at a frequency of 0.12 per 100,000 people (about 1 in 821,953 residents).
This page is the full Name Census profile for the Iacobelli 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
417
1 in 821,953
Census rank
#59,889
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
364
very rare in the US
Popularity narrative
The Census Bureau recorded 364 bearers of the surname Iacobelli in its 2020 decennial surname file. At a rate of 0.12 per 100,000 residents, it holds the 59889th position in the national surname ranking.
Among Census respondents with the surname Iacobelli, the largest self-reported group is White at 94.2%. The next largest groups are Hispanic (4.9%) and Two or More Races (0.5%).
Origin
Meaning and origin of Iacobelli
The surname Iacobelli originates from Italy and can be traced back to the Middle Ages. It is an Italian patronymic name derived from the personal name Iacopo, which is the Italian form of the biblical name Jacob. The name likely originated in regions like Tuscany, Lazio, and Campania, where the name Iacopo was commonly used.
One of the earliest recorded instances of the name Iacobelli can be found in the historical records of the city of Florence, dating back to the 13th century. In these records, a certain Iacobello di Giovanni is mentioned as a prominent merchant and banker during that time period.
The Iacobelli name also appears in several medieval manuscripts and documents from various Italian cities and regions. For example, in the 14th century, there are records of a nobleman named Iacobello Iacobelli, who was a member of the ruling Iacobelli family in the town of Montepulciano, Tuscany.
Throughout the centuries, the Iacobelli name has undergone slight variations in spelling, such as Jacobelli, Giacobelli, and Jacobili. These variations were often influenced by regional dialects and local pronunciations.
One notable individual with the surname Iacobelli was Girolamo Iacobelli (1525-1598), an Italian architect and engineer who was involved in the construction of several important buildings in Rome, including the Palazzo dei Conservatori on the Capitoline Hill.
Another prominent figure was Domenico Iacobelli (1676-1738), an Italian painter and architect who worked extensively in the city of Naples and its surrounding areas. His most famous work is the Chiesa dell'Incoronata Madre del Buon Consiglio in Naples.
In the 19th century, Antonio Iacobelli (1813-1880) was a renowned Italian lawyer and politician who served as a member of the Italian Parliament and was actively involved in the Risorgimento movement for Italian unification.
Additionally, the Iacobelli name is associated with the town of Iacobelli (now known as Cossignano) in the province of Ascoli Piceno, in the Marche region of central Italy. This town likely took its name from a prominent Iacobelli family that resided there in the past.
Another notable individual was the Italian author and poet Luisa Iacobelli (1886-1974), who was born in the town of Sulmona in the Abruzzo region and gained recognition for her works celebrating the traditions and culture of her native region.
Demographics
Ancestry and ethnicity for Iacobelli
Among Census respondents with the surname Iacobelli, the largest self-reported group is White at 94.2%. The next largest groups are Hispanic (4.9%) and Two or More Races (0.5%).
The bar chart below shows how Iacobelli 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 Iacobelli surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.2% · 343
- Hispanic or Latino4.9% · 18
- Two or more races0.5% · 2
- American Indian and Alaska Native0.3% · 1
Timeline
Historical Census data for Iacobelli
Iacobelli 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
#51,830
National surname rank
Recorded bearers 401
+32 bearers (+8.7%)
Per 100,000 0.14
Rank movement Up 884 places
2020
#59,889
National surname rank
Recorded bearers 364
-37 bearers (-9.2%)
Per 100,000 0.12
Rank movement Down 8,059 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #52,714 | 369 | 0.14 | First available Census row | First available Census row |
| 2010 | #51,830 | 401 | 0.14 | +32 bearers (+8.7%) | Up 884 places |
| 2020 | #59,889 | 364 | 0.12 | -37 bearers (-9.2%) | Down 8,059 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 Iacobelli 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 | #51,830 | #59,889 | -15.5% |
| Count | 401 | 364 | -9.2% |
| Per 100K | 0.14 | 0.12 | -13.0% |
Between the 2010 and 2020 Census, the number of Iacobelli bearers went from 401 to 364 (-9.2% change). The surname moved down 8,059 positions in the national ranking, going from #51,830 to #59,889.
FAQ
Iacobelli surname: questions and answers
How many people in the U.S. have the surname Iacobelli?
Name Census estimates that about 417 living Americans carry the surname Iacobelli. Using the current population baseline, that works out to roughly 1 in 821,953 residents.
How common is Iacobelli?
Iacobelli ranks #59,889 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.12 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 364 people with the surname Iacobelli. That is different from the site's living-bearer estimate (417), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.12 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.12 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 Iacobelli.
Has Iacobelli become more or less common over time?
Between 2010 and 2020, the surname Iacobelli went from 401 recorded bearers to 364. That is a decrease of 37 (-9.2%). In the national ranking it fell from #51,830 to #59,889.
What does the Census say about the background of Iacobelli?
Among Census respondents with the surname Iacobelli, the largest self-reported group is White at 94.2%. The next largest groups are Hispanic (4.9%) and Two or More Races (0.5%). 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 Iacobelli in the 2020 Census, accounting for 94.2% (343 people in the source table).
What is the full ancestry breakdown?
Iacobelli appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.2%), Hispanic (4.9%), Two or More Races (0.5%). 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 Iacobelli (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 Iacobelli mean?
An Italian surname derived from the given name Jacob (Iacopo, Giacomo). 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 Iacobelli (0.12 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 have the surname Iacobelli?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.