2010
#135,593
National surname rank
Recorded bearers 124
First available Census row
Per 100,000 0.04
Very Rare Last name
Iannace
A surname of Italian origin meaning "son of Ianni", a diminutive form of the name Giovanni.
According to the 2020 US Census Bureau surname tables, roughly 130 Americans carry the last name Iannace. That puts it at #147,221 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,636,572 residents).
This page is the full Name Census profile for the Iannace 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
130
1 in 2,636,572
Census rank
#147,221
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
113
very rare in the US
Popularity narrative
The Census Bureau recorded 113 bearers of the surname Iannace in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147221st position in the national surname ranking.
Among Census respondents with the surname Iannace, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.3%) and Two or More Races (1.8%).
Origin
Meaning and origin of Iannace
The surname Iannace originates from Italy, with its roots traceable to the medieval period. It is believed to have originated from the Italian regions of Campania and Basilicata, where variations of the name were commonly found.
One of the earliest recorded instances of the Iannace surname can be traced back to the 13th century, in a document from the city of Salerno, located in the Campania region. This document mentions a certain "Iohannes Iannace," indicating that the name was already in use during that time.
The name Iannace is derived from the Italian personal name "Ianno," which itself is a variation of the Latin name "Joannes" or "Johannes," meaning "God is gracious." The suffix "-ace" is a common Italian patronymic ending, indicating that the name likely originated as a way to identify someone as the son or descendant of an ancestor named Ianno.
In the 14th century, records from the town of Potenza in Basilicata mention a "Nicola Iannace," suggesting that the name had spread to other parts of southern Italy by that time. During this period, variations of the name such as "Iannacci" and "Iannacie" were also documented.
One notable historical figure bearing the Iannace surname was Gian Matteo Iannace (1564-1618), an Italian painter and architect from Naples. He is known for his contributions to the Baroque style of architecture and his work on several churches and palaces in Naples and its surroundings.
Another individual of note was Domenico Iannace (1598-1669), a Jesuit priest and philosopher from the town of Isernia in the Molise region. He wrote several works on philosophy and theology and was highly regarded for his teachings and scholarly pursuits.
In the 18th century, the Iannace surname gained prominence in the region of Calabria, with records mentioning a certain Saverio Iannace (1720-1792), a lawyer and judge from the city of Cosenza. He was known for his expertise in civil law and his contributions to the legal system of the Kingdom of Naples.
During the 19th century, the name Iannace continued to be found across various regions of southern Italy. One notable figure was Giuseppe Iannace (1840-1912), a politician and journalist from the town of Ariano Irpino in Campania. He was actively involved in the Italian unification movement and served as a deputy in the Parliament of the newly formed Kingdom of Italy.
Another significant individual was Raffaele Iannace (1865-1937), a priest and theologian from the city of Benevento. He was renowned for his scholarly works on Catholic theology and his contributions to the study of the Bible and its interpretation.
Demographics
Ancestry and ethnicity for Iannace
Among Census respondents with the surname Iannace, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.3%) and Two or More Races (1.8%).
The bar chart below shows how Iannace 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 Iannace surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.2% · 103
- Hispanic or Latino5.3% · 6
- Two or more races1.8% · 2
- Black or African American0.9% · 1
- Asian and Pacific Islander0.9% · 1
Timeline
Historical Census data for Iannace
Iannace 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
#147,221
National surname rank
Recorded bearers 113
-11 bearers (-8.9%)
Per 100,000 0.04
Rank movement Down 11,628 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #135,593 | 124 | 0.04 | First available Census row | First available Census row |
| 2020 | #147,221 | 113 | 0.04 | -11 bearers (-8.9%) | Down 11,628 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 Iannace 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 | #135,593 | #147,221 | -8.6% |
| Count | 124 | 113 | -8.9% |
| Per 100K | 0.04 | 0.04 | -5.5% |
Between the 2010 and 2020 Census, the number of Iannace bearers went from 124 to 113 (-8.9% change). The surname moved down 11,628 positions in the national ranking, going from #135,593 to #147,221.
FAQ
Iannace surname: questions and answers
How many people in the U.S. have the surname Iannace?
Name Census estimates that about 130 living Americans carry the surname Iannace. Using the current population baseline, that works out to roughly 1 in 2,636,572 residents.
How common is Iannace?
Iannace ranks #147,221 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 113 people with the surname Iannace. That is different from the site's living-bearer estimate (130), 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 Iannace.
Has Iannace become more or less common over time?
Between 2010 and 2020, the surname Iannace went from 124 recorded bearers to 113. That is a decrease of 11 (-8.9%). In the national ranking it fell from #135,593 to #147,221.
What does the Census say about the background of Iannace?
Among Census respondents with the surname Iannace, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (5.3%) and Two or More Races (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 Iannace in the 2020 Census, accounting for 91.2% (103 people in the source table).
What is the full ancestry breakdown?
Iannace appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.2%), Hispanic (5.3%), Two or More Races (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 Iannace (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 Iannace mean?
A surname of Italian origin meaning "son of Ianni", a diminutive form of the name Giovanni. 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 Iannace (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 Iannace?
For a quick modern take, check how many people have the surname Iannace on our sister site HowManyOfMe.org.