2000
#150,436
National surname rank
Recorded bearers 100
First available Census row
Per 100,000 0.04
Very Rare Last name
Ionadi
Locative surname suggesting origins in Ionadi, a town in Calabria, Italy.
According to the 2020 US Census Bureau surname tables, roughly 131 Americans carry the last name Ionadi. That puts it at #146,495 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,616,445 residents).
This page is the full Name Census profile for the Ionadi 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
131
1 in 2,616,445
Census rank
#146,495
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
114
very rare in the US
Popularity narrative
The Census Bureau recorded 114 bearers of the surname Ionadi in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 146495th position in the national surname ranking.
Among Census respondents with the surname Ionadi, the largest self-reported group is White at 96.5%. The next largest groups are Black (1.8%) and American Indian/Alaska Native (1.8%).
Origin
Meaning and origin of Ionadi
The surname Ionadi originated in the town of Ionadi, located in the region of Calabria in southern Italy. The name is thought to have derived from the Greek words "ionia" meaning violet and "adi" meaning place, suggesting that the area was once known for its abundance of violets or the name may have referred to a place where violets grew.
The earliest recorded mention of the surname Ionadi dates back to the 12th century, when it appeared in various historical documents and records from the Calabria region. Some of these early records include the Codex Diplomaticus Cavensis, a collection of charters from the Monastery of Cava de' Tirreni, which mentions several individuals with the surname Ionadi.
In the 14th century, the name Ionadi is found in the tax records of the Kingdom of Naples, indicating that families bearing this surname were landowners or held positions of prominence in the region. One notable individual from this period was Girolamo Ionadi (1305-1379), a renowned jurist and legal scholar who served as a judge in the court of King Robert of Naples.
During the Renaissance, the Ionadi family produced several notable figures, including the humanist scholar Antonio Ionadi (1450-1528), who was a respected writer and poet in the court of King Ferdinand II of Naples. Another prominent figure was the architect and engineer Francesco Ionadi (1520-1592), who designed several important buildings in Naples and surrounding areas.
In the 17th century, the Ionadi family gained further prominence with the birth of Vincenzo Ionadi (1635-1718), a highly respected theologian and philosopher who served as a professor at the University of Naples. He was also a prolific writer and published numerous works on theology and philosophy.
Throughout the 18th and 19th centuries, the Ionadi name continued to be associated with various professionals, including lawyers, doctors, and academics. One notable figure from this period was Giuseppe Ionadi (1775-1845), a renowned naturalist and botanist who contributed significantly to the study of the flora of southern Italy.
While the Ionadi surname is most commonly found in the Calabria region of Italy, it has also spread to other parts of the country and abroad due to migration and diaspora. However, the origins of this surname can be traced back to the town of Ionadi and its Greek-influenced roots in southern Italy.
Demographics
Ancestry and ethnicity for Ionadi
Among Census respondents with the surname Ionadi, the largest self-reported group is White at 96.5%. The next largest groups are Black (1.8%) and American Indian/Alaska Native (1.8%).
The bar chart below shows how Ionadi 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 Ionadi surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.5% · 110
- Black or African American1.8% · 2
- American Indian and Alaska Native1.8% · 2
Timeline
Historical Census data for Ionadi
Ionadi 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
#160,975
National surname rank
Recorded bearers 100
+0 bearers (+0.0%)
Per 100,000 0.03
Rank movement Down 10,539 places
2020
#146,495
National surname rank
Recorded bearers 114
+14 bearers (+14.0%)
Per 100,000 0.04
Rank movement Up 14,480 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #150,436 | 100 | 0.04 | First available Census row | First available Census row |
| 2010 | #160,975 | 100 | 0.03 | +0 bearers (+0.0%) | Down 10,539 places |
| 2020 | #146,495 | 114 | 0.04 | +14 bearers (+14.0%) | Up 14,480 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 Ionadi 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 | #160,975 | #146,495 | 9.0% |
| Count | 100 | 114 | 14.0% |
| Per 100K | 0.03 | 0.04 | 27.1% |
Between the 2010 and 2020 Census, the number of Ionadi bearers went from 100 to 114 (+14.0% change). The surname moved up 14,480 positions in the national ranking, going from #160,975 to #146,495.
FAQ
Ionadi surname: questions and answers
How many people in the U.S. have the surname Ionadi?
Name Census estimates that about 131 living Americans carry the surname Ionadi. Using the current population baseline, that works out to roughly 1 in 2,616,445 residents.
How common is Ionadi?
Ionadi ranks #146,495 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 114 people with the surname Ionadi. That is different from the site's living-bearer estimate (131), 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 Ionadi.
Has Ionadi become more or less common over time?
Between 2010 and 2020, the surname Ionadi went from 100 recorded bearers to 114. That is an increase of 14 (+14.0%). In the national ranking it rose from #160,975 to #146,495.
What does the Census say about the background of Ionadi?
Among Census respondents with the surname Ionadi, the largest self-reported group is White at 96.5%. The next largest groups are Black (1.8%) 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 Ionadi in the 2020 Census, accounting for 96.5% (110 people in the source table).
What is the full ancestry breakdown?
Ionadi appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.5%), Black (1.8%), 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 Ionadi (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 Ionadi mean?
Locative surname suggesting origins in Ionadi, a town in Calabria, Italy. 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 Ionadi (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 Americans have the surname Ionadi?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.