2010
#157,234
National surname rank
Recorded bearers 103
First available Census row
Per 100,000 0.03
Very Rare Last name
Iachini
A surname of Italian origin derived from a nickname or personal name related to strength or physique.
According to the 2020 US Census Bureau surname tables, roughly 136 Americans carry the last name Iachini. That puts it at #142,788 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,520,252 residents).
This page is the full Name Census profile for the Iachini 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
136
1 in 2,520,252
Census rank
#142,788
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
119
very rare in the US
Popularity narrative
The Census Bureau recorded 119 bearers of the surname Iachini in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 142788th position in the national surname ranking.
Among Census respondents with the surname Iachini, the largest self-reported group is White at 88.2%. The next largest groups are Hispanic (8.4%) and Two or More Races (2.5%).
Origin
Meaning and origin of Iachini
The surname Iachini has its origins in Italy, specifically in the regions of Tuscany and Emilia-Romagna. It is believed to have emerged during the late Middle Ages, around the 13th or 14th century.
Iachini is derived from the Italian personal name Iacopo, which itself comes from the Latin name Iacobus, a variant of the name Jacobus (Jacob). The name Iacopo was quite common in medieval Italy, particularly in the regions where the Iachini surname later emerged.
One of the earliest recorded instances of the Iachini surname appears in a document from the city of Siena, dated 1387. The document mentions a certain Gherardo Iachini, a merchant and landowner from the region.
In the 15th century, the Iachini family gained prominence in the town of Modena, where they were involved in various trades and professions. Records from this period mention several individuals with the surname, including a renowned physician named Bartolomeo Iachini, who lived from 1420 to 1492.
During the Renaissance period, the Iachini name was associated with several notable figures in the arts and sciences. One such figure was the painter and architect Giovanni Battista Iachini, who was active in Florence during the late 16th century.
Another prominent Iachini was the mathematician and astronomer Giuseppe Iachini, born in Modena in 1677. He made significant contributions to the study of celestial mechanics and was a member of the prestigious Accademia delle Scienze di Bologna.
In the 18th century, the Iachini family produced several notable members in the field of law and politics. One such individual was Pietro Iachini, a jurist and statesman from Bologna, who lived from 1710 to 1792 and held various important positions in the papal administration.
The name Iachini has also been associated with several places in Italy, including the village of Iachini located in the province of Siena, and the Iachini Mountains, a small mountain range in the Apennines.
Throughout its history, the Iachini surname has been spelled in various ways, including Iachino, Iacchini, and Jacchini, reflecting the regional variations in spelling and pronunciation.
Demographics
Ancestry and ethnicity for Iachini
Among Census respondents with the surname Iachini, the largest self-reported group is White at 88.2%. The next largest groups are Hispanic (8.4%) and Two or More Races (2.5%).
The bar chart below shows how Iachini 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 Iachini surname at the time of the 2020 Census, not any inherent property of the name itself.
- White88.2% · 105
- Hispanic or Latino8.4% · 10
- Two or more races2.5% · 3
- Black or African American0.8% · 1
Timeline
Historical Census data for Iachini
Iachini appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#142,788
National surname rank
Recorded bearers 119
+16 bearers (+15.5%)
Per 100,000 0.04
Rank movement Up 14,446 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #157,234 | 103 | 0.03 | First available Census row | First available Census row |
| 2020 | #142,788 | 119 | 0.04 | +16 bearers (+15.5%) | Up 14,446 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 Iachini 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 | #157,234 | #142,788 | 9.2% |
| Count | 103 | 119 | 15.5% |
| Per 100K | 0.03 | 0.04 | 32.7% |
Between the 2010 and 2020 Census, the number of Iachini bearers went from 103 to 119 (+15.5% change). The surname moved up 14,446 positions in the national ranking, going from #157,234 to #142,788.
FAQ
Iachini surname: questions and answers
How many people in the U.S. have the surname Iachini?
Name Census estimates that about 136 living Americans carry the surname Iachini. Using the current population baseline, that works out to roughly 1 in 2,520,252 residents.
How common is Iachini?
Iachini ranks #142,788 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 119 people with the surname Iachini. That is different from the site's living-bearer estimate (136), 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 Iachini.
Has Iachini become more or less common over time?
Between 2010 and 2020, the surname Iachini went from 103 recorded bearers to 119. That is an increase of 16 (+15.5%). In the national ranking it rose from #157,234 to #142,788.
What does the Census say about the background of Iachini?
Among Census respondents with the surname Iachini, the largest self-reported group is White at 88.2%. The next largest groups are Hispanic (8.4%) and Two or More Races (2.5%). 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 Iachini in the 2020 Census, accounting for 88.2% (105 people in the source table).
What is the full ancestry breakdown?
Iachini appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (88.2%), Hispanic (8.4%), Two or More Races (2.5%). 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 Iachini (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 Iachini mean?
A surname of Italian origin derived from a nickname or personal name related to strength or physique. 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 Iachini (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 common is the surname Iachini?
Our sister site HowManyOfMe.org answers how many people are called Iachini at a glance, with the living-bearer count up front.