2000
#50,366
National surname rank
Recorded bearers 390
First available Census row
Per 100,000 0.14
Very Rare Last name
Guarini
Italian surname of occupational origin meaning "keeper of the guard".
According to the 2020 US Census Bureau surname tables, roughly 514 Americans carry the last name Guarini. That puts it at #50,441 in the national surname ranking, appearing at a frequency of 0.15 per 100,000 people (about 1 in 666,837 residents).
This page is the full Name Census profile for the Guarini 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
514
1 in 666,837
Census rank
#50,441
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
448
very rare in the US
Popularity narrative
The Census Bureau recorded 448 bearers of the surname Guarini in its 2020 decennial surname file. At a rate of 0.15 per 100,000 residents, it holds the 50441st position in the national surname ranking.
Among Census respondents with the surname Guarini, the largest self-reported group is White at 90.0%. The next largest groups are Two or More Races (4.5%) and Hispanic (4.2%).
Origin
Meaning and origin of Guarini
The surname Guarini originated in Italy, likely during the medieval period. It is believed to have derived from the Italian personal name "Guarino," which itself may have roots in the Germanic name "Warin" or "Warinus." This name was associated with individuals who were watchful or vigilant.
The earliest recorded instances of the surname Guarini can be traced back to the 13th and 14th centuries in various regions of Italy, such as Tuscany, Emilia-Romagna, and Lombardy. Some of the earliest documented individuals with this surname include Guarino da Verona (1370-1460), a renowned Italian humanist and translator, and Battista Guarini (1537-1612), an Italian poet and playwright best known for his pastoral tragicomedy "Il Pastor Fido."
In the 15th century, the surname Guarini appeared in several historical records, including the registers of the Republic of Venice and the archives of the Duchy of Milan. During this period, the name was often associated with noble families and influential individuals in various Italian cities.
One notable bearer of the Guarini surname was Camillo Guarini (1624-1683), an Italian architect and mathematician who is best known for his design of the Baroque church of San Lorenzo in Turin. His innovative architectural techniques influenced the development of the Baroque style in Italy and beyond.
Another prominent figure with the surname Guarini was Giovanni Battista Guarini (1538-1612), an Italian poet, and diplomat. He served as a secretary to the Duke of Ferrara and later became a member of the Accademia della Crusca, a prestigious literary academy in Florence.
In the 18th century, the surname Guarini was also associated with the Italian composer and musicologist Battista Guarini (1703-1786), who made significant contributions to the study of music theory and composition.
Throughout history, the Guarini surname has been found in various regions of Italy, including Tuscany, Emilia-Romagna, Lombardy, and Veneto, among others. While the name has maintained its Italian roots, it has also spread to other parts of the world through emigration and cultural exchange.
Demographics
Ancestry and ethnicity for Guarini
Among Census respondents with the surname Guarini, the largest self-reported group is White at 90.0%. The next largest groups are Two or More Races (4.5%) and Hispanic (4.2%).
The bar chart below shows how Guarini 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 Guarini surname at the time of the 2020 Census, not any inherent property of the name itself.
- White90.0% · 403
- Two or more races4.5% · 20
- Hispanic or Latino4.2% · 19
- Asian and Pacific Islander1.1% · 5
- American Indian and Alaska Native0.2% · 1
Timeline
Historical Census data for Guarini
Guarini 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
#57,372
National surname rank
Recorded bearers 355
-35 bearers (-9.0%)
Per 100,000 0.12
Rank movement Down 7,006 places
2020
#50,441
National surname rank
Recorded bearers 448
+93 bearers (+26.2%)
Per 100,000 0.15
Rank movement Up 6,931 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #50,366 | 390 | 0.14 | First available Census row | First available Census row |
| 2010 | #57,372 | 355 | 0.12 | -35 bearers (-9.0%) | Down 7,006 places |
| 2020 | #50,441 | 448 | 0.15 | +93 bearers (+26.2%) | Up 6,931 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 Guarini 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 | #57,372 | #50,441 | 12.1% |
| Count | 355 | 448 | 26.2% |
| Per 100K | 0.12 | 0.15 | 24.9% |
Between the 2010 and 2020 Census, the number of Guarini bearers went from 355 to 448 (+26.2% change). The surname moved up 6,931 positions in the national ranking, going from #57,372 to #50,441.
Notable bearers
Famous people with the surname Guarini
FAQ
Guarini surname: questions and answers
How many people in the U.S. have the surname Guarini?
Name Census estimates that about 514 living Americans carry the surname Guarini. Using the current population baseline, that works out to roughly 1 in 666,837 residents.
How common is Guarini?
Guarini ranks #50,441 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.15 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 448 people with the surname Guarini. That is different from the site's living-bearer estimate (514), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.15 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.15 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 Guarini.
Has Guarini become more or less common over time?
Between 2010 and 2020, the surname Guarini went from 355 recorded bearers to 448. That is an increase of 93 (+26.2%). In the national ranking it rose from #57,372 to #50,441.
What does the Census say about the background of Guarini?
Among Census respondents with the surname Guarini, the largest self-reported group is White at 90.0%. The next largest groups are Two or More Races (4.5%) and Hispanic (4.2%). 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 Guarini in the 2020 Census, accounting for 90.0% (403 people in the source table).
What is the full ancestry breakdown?
Guarini appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (90.0%), Two or More Races (4.5%), Hispanic (4.2%). 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 Guarini (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 Guarini mean?
Italian surname of occupational origin meaning "keeper of the guard". 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 Guarini (0.15 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 have the last name Guarini?
Want to know how many Americans have the surname Guarini? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.