2010
#159,712
National surname rank
Recorded bearers 101
First available Census row
Per 100,000 0.03
Very Rare Last name
Giacomozzi
An Italian surname derived from the given name Giacomo, meaning "supplanter".
According to the 2020 US Census Bureau surname tables, roughly 117 Americans carry the last name Giacomozzi. That puts it at #154,755 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,929,524 residents).
This page is the full Name Census profile for the Giacomozzi 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
117
1 in 2,929,524
Census rank
#154,755
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
102
very rare in the US
Popularity narrative
The Census Bureau recorded 102 bearers of the surname Giacomozzi in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 154755th position in the national surname ranking.
Among Census respondents with the surname Giacomozzi, the largest self-reported group is White at 89.2%. The next largest groups are Two or More Races (5.9%) and Hispanic (3.9%).
Origin
Meaning and origin of Giacomozzi
The surname Giacomozzi is of Italian origin, specifically from the regions of Tuscany and Emilia-Romagna. It is believed to have emerged in the late medieval period, around the 13th or 14th century. The name is a patronymic derived from the Italian given name Giacomo, which is the Italian form of the name Jacob, ultimately tracing its roots back to the Hebrew name Ya'aqov.
The earliest recorded instance of the surname Giacomozzi can be found in historical records from the city of Florence, dating back to the late 14th century. These records mention a certain Giacomozzi family who were merchants and landowners in the surrounding areas of Tuscany. One notable member of this family was Bartolomeo Giacomozzi, born in 1412, who was a respected lawyer and diplomat in the service of the Medici family.
In the 16th century, the surname Giacomozzi appears in records from the city of Bologna, in the Emilia-Romagna region. These records mention a family of the same name who were involved in the silk trade and had established themselves as wealthy merchants. One notable figure from this branch of the Giacomozzi family was Lucrezia Giacomozzi, born in 1549, who was a renowned poet and patron of the arts.
As the name spread across Italy, variations in spelling and pronunciation emerged. Some of the older recorded spellings include Giacomozzi, Giacomozio, and Giacomuzzo. These variations can be attributed to regional dialects and the influence of different Italian languages.
In the 17th century, the Giacomozzi name appears in records from the city of Venice, where a family of the same name had established themselves as successful glassmakers and traders. One notable member of this Venetian branch was Marco Giacomozzi, born in 1635, who was a renowned glass artist and innovator in the field of glassblowing techniques.
Another notable figure with the surname Giacomozzi was Vincenzo Giacomozzi, born in 1775 in the city of Naples. He was a prominent lawyer and political figure who played a role in the Napoleonic reforms of the early 19th century in the Kingdom of Naples.
These are just a few examples of notable individuals throughout history who bore the surname Giacomozzi. While the name may have originated in specific regions of Italy, it eventually spread across the country and even beyond, carried by families engaged in various professions and trades.
Demographics
Ancestry and ethnicity for Giacomozzi
Among Census respondents with the surname Giacomozzi, the largest self-reported group is White at 89.2%. The next largest groups are Two or More Races (5.9%) and Hispanic (3.9%).
The bar chart below shows how Giacomozzi 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 Giacomozzi surname at the time of the 2020 Census, not any inherent property of the name itself.
- White89.2% · 91
- Two or more races5.9% · 6
- Hispanic or Latino3.9% · 4
- Asian and Pacific Islander1.0% · 1
Timeline
Historical Census data for Giacomozzi
Giacomozzi 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
#154,755
National surname rank
Recorded bearers 102
+1 bearers (+1.0%)
Per 100,000 0.03
Rank movement Up 4,957 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #159,712 | 101 | 0.03 | First available Census row | First available Census row |
| 2020 | #154,755 | 102 | 0.03 | +1 bearers (+1.0%) | Up 4,957 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 Giacomozzi 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 | #159,712 | #154,755 | 3.1% |
| Count | 101 | 102 | 1.0% |
| Per 100K | 0.03 | 0.03 | 13.8% |
Between the 2010 and 2020 Census, the number of Giacomozzi bearers went from 101 to 102 (+1.0% change). The surname moved up 4,957 positions in the national ranking, going from #159,712 to #154,755.
FAQ
Giacomozzi surname: questions and answers
How many people in the U.S. have the surname Giacomozzi?
Name Census estimates that about 117 living Americans carry the surname Giacomozzi. Using the current population baseline, that works out to roughly 1 in 2,929,524 residents.
How common is Giacomozzi?
Giacomozzi ranks #154,755 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 102 people with the surname Giacomozzi. That is different from the site's living-bearer estimate (117), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Giacomozzi.
Has Giacomozzi become more or less common over time?
Between 2010 and 2020, the surname Giacomozzi went from 101 recorded bearers to 102. That is an increase of 1 (+1.0%). In the national ranking it rose from #159,712 to #154,755.
What does the Census say about the background of Giacomozzi?
Among Census respondents with the surname Giacomozzi, the largest self-reported group is White at 89.2%. The next largest groups are Two or More Races (5.9%) and Hispanic (3.9%). 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 Giacomozzi in the 2020 Census, accounting for 89.2% (91 people in the source table).
What is the full ancestry breakdown?
Giacomozzi appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (89.2%), Two or More Races (5.9%), Hispanic (3.9%). 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 Giacomozzi (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 Giacomozzi mean?
An Italian surname derived from the given name Giacomo, meaning "supplanter". 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 Giacomozzi (0.03 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 share the surname Giacomozzi?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.