2000
#84,631
National surname rank
Recorded bearers 206
First available Census row
Per 100,000 0.08
Very Rare Last name
Tranquillo
An Italian surname meaning "calm" or "tranquil."
According to the 2020 US Census Bureau surname tables, roughly 218 Americans carry the last name Tranquillo. That puts it at #101,282 in the national surname ranking, appearing at a frequency of 0.06 per 100,000 people (about 1 in 1,572,268 residents).
This page is the full Name Census profile for the Tranquillo 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
218
1 in 1,572,268
Census rank
#101,282
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
190
very rare in the US
Popularity narrative
The Census Bureau recorded 190 bearers of the surname Tranquillo in its 2020 decennial surname file. At a rate of 0.06 per 100,000 residents, it holds the 101282nd position in the national surname ranking.
Among Census respondents with the surname Tranquillo, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (3.7%) and Two or More Races (3.7%).
Origin
Meaning and origin of Tranquillo
The surname Tranquillo originated in Italy, with its earliest recorded examples dating back to the 14th century. It is derived from the Italian word "tranquillo," meaning "calm" or "peaceful." The name likely originated as a descriptive nickname for someone with a placid or serene demeanor.
Tranquillo is believed to have first emerged in the region of Tuscany, where it was initially spelled as "Tranquilli." Over time, the spelling evolved to its current form, Tranquillo. The name can be found in various historical records from Tuscany, including municipal archives and church registers.
One of the earliest known bearers of the name was Giovanni Tranquillo, a merchant from Florence who lived in the late 14th century. Records show that he traded in silk and spices, and his business dealings took him as far as Venice and other Italian city-states.
In the 15th century, the Tranquillo family gained prominence in the Tuscan town of Siena. Matteo Tranquillo, born in 1421, was a respected lawyer and served as a judge in the city's judiciary. His son, Benedetto Tranquillo (1458-1537), followed in his father's footsteps and became a renowned legal scholar.
During the Renaissance period, the name Tranquillo was also associated with the arts. Antonio Tranquillo (1512-1572), a native of Florence, was a skilled painter and sculptor. His works can be found in various churches and museums throughout Italy.
In the 17th century, the Tranquillo family established itself in Naples, where they became influential in the city's cultural and political life. Girolamo Tranquillo (1638-1702) was a prominent philosopher and writer who published several treatises on ethics and metaphysics.
Another notable figure was Carlo Tranquillo (1715-1789), a military officer from Naples who fought in the Wars of the Polish Succession and the Seven Years' War. He rose through the ranks and eventually became a general in the Neapolitan army.
As the Tranquillo name spread across Italy, it also made its way to other parts of Europe and the Americas through migration and trade. While the name is still most commonly found in Italy, there are also pockets of Tranquillos in countries like Argentina, Brazil, and the United States, where Italian immigrants settled over the centuries.
Demographics
Ancestry and ethnicity for Tranquillo
Among Census respondents with the surname Tranquillo, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (3.7%) and Two or More Races (3.7%).
The bar chart below shows how Tranquillo 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 Tranquillo surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.1% · 175
- Hispanic or Latino3.7% · 7
- Two or more races3.7% · 7
- Black or African American0.5% · 1
Timeline
Historical Census data for Tranquillo
Tranquillo 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
#81,458
National surname rank
Recorded bearers 232
+26 bearers (+12.6%)
Per 100,000 0.08
Rank movement Up 3,173 places
2020
#101,282
National surname rank
Recorded bearers 190
-42 bearers (-18.1%)
Per 100,000 0.06
Rank movement Down 19,824 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #84,631 | 206 | 0.08 | First available Census row | First available Census row |
| 2010 | #81,458 | 232 | 0.08 | +26 bearers (+12.6%) | Up 3,173 places |
| 2020 | #101,282 | 190 | 0.06 | -42 bearers (-18.1%) | Down 19,824 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 Tranquillo 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 | #81,458 | #101,282 | -24.3% |
| Count | 232 | 190 | -18.1% |
| Per 100K | 0.08 | 0.06 | -20.5% |
Between the 2010 and 2020 Census, the number of Tranquillo bearers went from 232 to 190 (-18.1% change). The surname moved down 19,824 positions in the national ranking, going from #81,458 to #101,282.
FAQ
Tranquillo surname: questions and answers
How many people in the U.S. have the surname Tranquillo?
Name Census estimates that about 218 living Americans carry the surname Tranquillo. Using the current population baseline, that works out to roughly 1 in 1,572,268 residents.
How common is Tranquillo?
Tranquillo ranks #101,282 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.06 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 190 people with the surname Tranquillo. That is different from the site's living-bearer estimate (218), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.06 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.06 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 Tranquillo.
Has Tranquillo become more or less common over time?
Between 2010 and 2020, the surname Tranquillo went from 232 recorded bearers to 190. That is a decrease of 42 (-18.1%). In the national ranking it fell from #81,458 to #101,282.
What does the Census say about the background of Tranquillo?
Among Census respondents with the surname Tranquillo, the largest self-reported group is White at 92.1%. The next largest groups are Hispanic (3.7%) and Two or More Races (3.7%). 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 Tranquillo in the 2020 Census, accounting for 92.1% (175 people in the source table).
What is the full ancestry breakdown?
Tranquillo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.1%), Hispanic (3.7%), Two or More Races (3.7%). 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 Tranquillo (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 Tranquillo mean?
An Italian surname meaning "calm" or "tranquil." 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 Tranquillo (0.06 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 Tranquillo?
For a quick modern take, check how many people have the last name Tranquillo on our sister site HowManyOfMe.org.