2000
#133,114
National surname rank
Recorded bearers 117
First available Census row
Per 100,000 0.04
Very Rare Last name
Iannini
An Italian surname referring to "John" or "son of John".
According to the 2020 US Census Bureau surname tables, roughly 134 Americans carry the last name Iannini. That puts it at #144,270 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,557,868 residents).
This page is the full Name Census profile for the Iannini 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
134
1 in 2,557,868
Census rank
#144,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
117
very rare in the US
Popularity narrative
The Census Bureau recorded 117 bearers of the surname Iannini in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 144270th position in the national surname ranking.
Among Census respondents with the surname Iannini, the largest self-reported group is White at 83.8%. The next largest groups are Hispanic (13.7%) and Black (1.7%).
Origin
Meaning and origin of Iannini
The surname IANNINI is of Italian origin, with its roots tracing back to the Medieval period. It is believed to have originated from the Italian word "Ianno," which was a diminutive form of the name Giano, the Italian version of the Roman god Janus. The suffix "-ini" denotes a patronymic form, indicating that the name was derived from an ancestor's given name.
IANNINI is particularly associated with the regions of Tuscany and Umbria, where it is believed to have first emerged. The earliest known records of this surname date back to the 13th century, with mentions of individuals bearing this name in historical documents and manuscripts from these regions.
One of the earliest documented instances of the IANNINI surname can be found in the Florentine Priorista, a record of the members of the Signoria of Florence, which lists a certain Filippo di Ianno Iannini in 1352. Similarly, the Codice Diplomatico Aretino, a collection of medieval documents from the city of Arezzo, mentions a Bartolomeo Iannini in 1318.
Over the centuries, the IANNINI surname has been associated with several notable individuals. In the 15th century, Niccolò Iannini (1440-1514) was a prominent Florentine architect and sculptor who worked on various projects, including the Palazzo Strozzi in Florence. During the Renaissance period, Domenico Iannini (1498-1571) was a celebrated painter and architect from Faenza, known for his frescoes in the Basilica of San Vitale in Ravenna.
In the literary realm, Gian Battista Iannini (1575-1653) was an Italian poet and playwright from Perugia, renowned for his pastoral poems and tragedies. More recently, Tommaso Iannini (1836-1905) was an Italian politician and journalist who served as a deputy in the Italian parliament and founded the newspaper Il Resto del Carlino in Bologna.
Another notable figure was Guido Iannini (1892-1952), an Italian military officer and politician who served as the Minister of Public Works in Benito Mussolini's government during World War II.
While the IANNINI surname has its roots in medieval Italy, it has since spread to other parts of the world, particularly through immigration. However, its origins and historical significance remain deeply rooted in the regions of Tuscany and Umbria, where it first emerged as a distinctive Italian surname.
Demographics
Ancestry and ethnicity for Iannini
Among Census respondents with the surname Iannini, the largest self-reported group is White at 83.8%. The next largest groups are Hispanic (13.7%) and Black (1.7%).
The bar chart below shows how Iannini 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 Iannini surname at the time of the 2020 Census, not any inherent property of the name itself.
- White83.8% · 98
- Hispanic or Latino13.7% · 16
- Black or African American1.7% · 2
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Iannini
Iannini 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
#146,201
National surname rank
Recorded bearers 113
-4 bearers (-3.4%)
Per 100,000 0.04
Rank movement Down 13,087 places
2020
#144,270
National surname rank
Recorded bearers 117
+4 bearers (+3.5%)
Per 100,000 0.04
Rank movement Up 1,931 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #133,114 | 117 | 0.04 | First available Census row | First available Census row |
| 2010 | #146,201 | 113 | 0.04 | -4 bearers (-3.4%) | Down 13,087 places |
| 2020 | #144,270 | 117 | 0.04 | +4 bearers (+3.5%) | Up 1,931 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 Iannini 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 | #146,201 | #144,270 | 1.3% |
| Count | 113 | 117 | 3.5% |
| Per 100K | 0.04 | 0.04 | -2.1% |
Between the 2010 and 2020 Census, the number of Iannini bearers went from 113 to 117 (+3.5% change). The surname moved up 1,931 positions in the national ranking, going from #146,201 to #144,270.
FAQ
Iannini surname: questions and answers
How many people in the U.S. have the surname Iannini?
Name Census estimates that about 134 living Americans carry the surname Iannini. Using the current population baseline, that works out to roughly 1 in 2,557,868 residents.
How common is Iannini?
Iannini ranks #144,270 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 117 people with the surname Iannini. That is different from the site's living-bearer estimate (134), 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 Iannini.
Has Iannini become more or less common over time?
Between 2010 and 2020, the surname Iannini went from 113 recorded bearers to 117. That is an increase of 4 (+3.5%). In the national ranking it rose from #146,201 to #144,270.
What does the Census say about the background of Iannini?
Among Census respondents with the surname Iannini, the largest self-reported group is White at 83.8%. The next largest groups are Hispanic (13.7%) and Black (1.7%). 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 Iannini in the 2020 Census, accounting for 83.8% (98 people in the source table).
What is the full ancestry breakdown?
Iannini appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (83.8%), Hispanic (13.7%), Black (1.7%). 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 Iannini (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 Iannini mean?
An Italian surname referring to "John" or "son of John". 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 Iannini (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 have the surname Iannini?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.