2000
#134,929
National surname rank
Recorded bearers 115
First available Census row
Per 100,000 0.04
Very Rare Last name
Tronzo
A surname derived from the Italian word "tronzo" meaning stump or log.
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Tronzo. That puts it at #155,270 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,954,779 residents).
This page is the full Name Census profile for the Tronzo 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
116
1 in 2,954,779
Census rank
#155,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
101
very rare in the US
Popularity narrative
The Census Bureau recorded 101 bearers of the surname Tronzo in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155270th position in the national surname ranking.
Among Census respondents with the surname Tronzo, the largest self-reported group is White at 95.0%. The next largest groups are Two or More Races (3.0%) and Hispanic (2.0%).
Origin
Meaning and origin of Tronzo
The surname Tronzo is believed to have originated in Italy, specifically in the region of Calabria, during the Middle Ages. It is thought to derive from the Latin word "tronco," meaning "tree trunk" or "log," suggesting a possible connection to forestry or woodworking professions.
One of the earliest recorded instances of the name Tronzo can be found in a document from the 13th century, which mentions a family with this surname living in the town of Rossano, located in the province of Cosenza, Calabria. This document provides valuable insight into the historical presence of the Tronzo name in this region.
Throughout the centuries, the Tronzo surname has been associated with various notable individuals. In the 15th century, Giovanni Tronzo was a renowned painter and fresco artist who worked on several churches and cathedrals in the Calabria region, leaving a lasting legacy in the art world.
Another prominent figure bearing the Tronzo surname was Vincenzo Tronzo, who lived in the 17th century and was a respected philosopher and theologian. His writings and teachings contributed significantly to the intellectual discourse of his time.
During the 19th century, the Tronzo name gained further recognition with the birth of Giuseppe Tronzo (1825-1897), a prominent political activist and advocate for workers' rights. His efforts played a crucial role in shaping labor reforms and improving working conditions in Italy.
It is worth noting that variations in spelling, such as Tronzi or Tronzio, have also been documented throughout history, reflecting the linguistic evolution and regional dialects of the areas where the name was prevalent.
As the Tronzo family spread across Italy and beyond, the surname continued to be associated with individuals who made significant contributions in various fields, including the arts, academia, and public service. The legacy of this surname serves as a testament to the rich cultural heritage and diverse achievements of those who bore it throughout the centuries.
Demographics
Ancestry and ethnicity for Tronzo
Among Census respondents with the surname Tronzo, the largest self-reported group is White at 95.0%. The next largest groups are Two or More Races (3.0%) and Hispanic (2.0%).
The bar chart below shows how Tronzo 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 Tronzo surname at the time of the 2020 Census, not any inherent property of the name itself.
- White95.0% · 96
- Two or more races3.0% · 3
- Hispanic or Latino2.0% · 2
Timeline
Historical Census data for Tronzo
Tronzo 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
#150,452
National surname rank
Recorded bearers 109
-6 bearers (-5.2%)
Per 100,000 0.04
Rank movement Down 15,523 places
2020
#155,270
National surname rank
Recorded bearers 101
-8 bearers (-7.3%)
Per 100,000 0.03
Rank movement Down 4,818 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #134,929 | 115 | 0.04 | First available Census row | First available Census row |
| 2010 | #150,452 | 109 | 0.04 | -6 bearers (-5.2%) | Down 15,523 places |
| 2020 | #155,270 | 101 | 0.03 | -8 bearers (-7.3%) | Down 4,818 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 Tronzo 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 | #150,452 | #155,270 | -3.2% |
| Count | 109 | 101 | -7.3% |
| Per 100K | 0.04 | 0.03 | -15.5% |
Between the 2010 and 2020 Census, the number of Tronzo bearers went from 109 to 101 (-7.3% change). The surname moved down 4,818 positions in the national ranking, going from #150,452 to #155,270.
FAQ
Tronzo surname: questions and answers
How many people in the U.S. have the surname Tronzo?
Name Census estimates that about 116 living Americans carry the surname Tronzo. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Tronzo?
Tronzo ranks #155,270 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 101 people with the surname Tronzo. That is different from the site's living-bearer estimate (116), 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 Tronzo.
Has Tronzo become more or less common over time?
Between 2010 and 2020, the surname Tronzo went from 109 recorded bearers to 101. That is a decrease of 8 (-7.3%). In the national ranking it fell from #150,452 to #155,270.
What does the Census say about the background of Tronzo?
Among Census respondents with the surname Tronzo, the largest self-reported group is White at 95.0%. The next largest groups are Two or More Races (3.0%) and Hispanic (2.0%). 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 Tronzo in the 2020 Census, accounting for 95.0% (96 people in the source table).
What is the full ancestry breakdown?
Tronzo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (95.0%), Two or More Races (3.0%), Hispanic (2.0%). 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 Tronzo (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 Tronzo mean?
A surname derived from the Italian word "tronzo" meaning stump or log. 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 Tronzo (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 Americans have the surname Tronzo?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.