2010
#143,149
National surname rank
Recorded bearers 116
First available Census row
Per 100,000 0.04
Very Rare Last name
Giacomantonio
Italian surname derived from the combination of the given names Giacomo and Antonio.
According to the 2020 US Census Bureau surname tables, roughly 123 Americans carry the last name Giacomantonio. That puts it at #151,639 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,786,621 residents).
This page is the full Name Census profile for the Giacomantonio 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
123
1 in 2,786,621
Census rank
#151,639
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
107
very rare in the US
Popularity narrative
The Census Bureau recorded 107 bearers of the surname Giacomantonio in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 151639th position in the national surname ranking.
Among Census respondents with the surname Giacomantonio, the largest self-reported group is White at 92.5%. The next largest groups are Two or More Races (3.7%) and Hispanic (1.9%).
Origin
Meaning and origin of Giacomantonio
The surname GIACOMANTONIO originates from Italy, with roots dating back to the Middle Ages. It is a compound name formed from the Italian words "Giacomo" and "Antonio," which are the Italian equivalents of the biblical names Jacob and Anthony, respectively.
The name GIACOMANTONIO likely emerged as a way to distinguish individuals within a family or community, with the combination of the two common Italian names serving as a unique identifier. This practice was common during the medieval period when surnames were becoming more prevalent.
One of the earliest recorded instances of the name GIACOMANTONIO can be found in the 14th century. In 1387, a document from the city of Siena mentions a man named Giacomantonio di Bartolomeo, who was a merchant and landowner.
Another notable figure with this surname was Giacomantonio Bassano, a 16th-century Italian painter from the Renaissance era. Born in 1550 in the town of Bassano del Grappa, he was part of the Bassano family of artists and is known for his religious and allegorical works.
In the 17th century, there are records of a Giacomantonio Bonomi, a Milanese architect and engineer who worked on several significant architectural projects, including the Palazzo Reale in Milan.
During the 18th century, Giacomantonio Draghi was a prominent Italian composer and organist. Born in 1635 in Rimini, he spent much of his career in London, where he served as the organist at the Chapel Royal and composed operas and instrumental works.
The 19th century saw a Giacomantonio Guadagnoli, an Italian playwright and poet who was born in Arezzo in 1798. His comedic plays and satirical works were popular during his lifetime and contributed to the development of Italian theater.
While the surname GIACOMANTONIO is not as common as some other Italian surnames, it has a rich history that spans several centuries and includes notable individuals in various fields, from the arts and architecture to literature and music.
Demographics
Ancestry and ethnicity for Giacomantonio
Among Census respondents with the surname Giacomantonio, the largest self-reported group is White at 92.5%. The next largest groups are Two or More Races (3.7%) and Hispanic (1.9%).
The bar chart below shows how Giacomantonio 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 Giacomantonio surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.5% · 99
- Two or more races3.7% · 4
- Hispanic or Latino1.9% · 2
- Asian and Pacific Islander1.9% · 2
Timeline
Historical Census data for Giacomantonio
Giacomantonio 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
#151,639
National surname rank
Recorded bearers 107
-9 bearers (-7.8%)
Per 100,000 0.04
Rank movement Down 8,490 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #143,149 | 116 | 0.04 | First available Census row | First available Census row |
| 2020 | #151,639 | 107 | 0.04 | -9 bearers (-7.8%) | Down 8,490 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 Giacomantonio 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 | #143,149 | #151,639 | -5.9% |
| Count | 116 | 107 | -7.8% |
| Per 100K | 0.04 | 0.04 | -10.5% |
Between the 2010 and 2020 Census, the number of Giacomantonio bearers went from 116 to 107 (-7.8% change). The surname moved down 8,490 positions in the national ranking, going from #143,149 to #151,639.
FAQ
Giacomantonio surname: questions and answers
How many people in the U.S. have the surname Giacomantonio?
Name Census estimates that about 123 living Americans carry the surname Giacomantonio. Using the current population baseline, that works out to roughly 1 in 2,786,621 residents.
How common is Giacomantonio?
Giacomantonio ranks #151,639 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 107 people with the surname Giacomantonio. That is different from the site's living-bearer estimate (123), 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 Giacomantonio.
Has Giacomantonio become more or less common over time?
Between 2010 and 2020, the surname Giacomantonio went from 116 recorded bearers to 107. That is a decrease of 9 (-7.8%). In the national ranking it fell from #143,149 to #151,639.
What does the Census say about the background of Giacomantonio?
Among Census respondents with the surname Giacomantonio, the largest self-reported group is White at 92.5%. The next largest groups are Two or More Races (3.7%) and Hispanic (1.9%). 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 Giacomantonio in the 2020 Census, accounting for 92.5% (99 people in the source table).
What is the full ancestry breakdown?
Giacomantonio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.5%), Two or More Races (3.7%), Hispanic (1.9%). 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 Giacomantonio (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 Giacomantonio mean?
Italian surname derived from the combination of the given names Giacomo and Antonio. 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 Giacomantonio (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 Giacomantonio?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.