2000
#148,244
National surname rank
Recorded bearers 102
First available Census row
Per 100,000 0.04
Very Rare Last name
Tiezzi
An Italian surname derived from place names in Tuscany and Umbria.
According to the 2020 US Census Bureau surname tables, roughly 123 Americans carry the last name Tiezzi. 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 Tiezzi 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 Tiezzi 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 Tiezzi, the largest self-reported group is White at 100.0%.
Origin
Meaning and origin of Tiezzi
The surname Tiezzi is of Italian origin, deriving from the northern regions of the country during the medieval period. It is believed to have evolved from the Latin word "titius," which referred to a person's status or rank. This connection suggests that the earliest bearers of the name may have held positions of authority or prominence within their communities.
One of the earliest recorded instances of the Tiezzi name can be found in the 13th century, when a nobleman named Gualtiero Tiezzi was mentioned in historical records from the city of Siena. This reference provides evidence of the name's longevity and its association with the Tuscan region of Italy.
In the 14th century, a renowned scholar and physician named Bartolomeo Tiezzi lived in Foligno, a town in the Umbria region. His medical writings and contributions to the field of medicine at the time earned him a notable reputation, further establishing the Tiezzi name in Italian history.
During the Renaissance period, the Tiezzi family produced several notable figures, including the architect and sculptor Gian Paolo Tiezzi (1522-1600), who was responsible for the design and construction of several prominent buildings in Rome and other Italian cities.
Another prominent individual bearing the Tiezzi surname was Girolamo Tiezzi (1609-1683), a Jesuit priest and academic who taught philosophy and theology at various universities in Italy. His scholarly works and contributions to the intellectual discourse of the time solidified the Tiezzi name in the realm of academia.
In the 19th century, the Tiezzi name gained further recognition with the birth of Ettore Tiezzi (1832-1910), a renowned Italian sculptor and painter. His works, which included public monuments and religious artworks, can be found in various churches and galleries throughout Italy, showcasing the artistic talents associated with this surname.
Throughout its history, the Tiezzi name has been closely tied to the Italian regions of Tuscany and Umbria, with occasional references to its presence in other parts of the country. While its origins can be traced back to the medieval period, the name has endured and continues to be carried by individuals of Italian descent to this day, reflecting its deep-rooted connection to the country's rich cultural heritage.
Demographics
Ancestry and ethnicity for Tiezzi
Among Census respondents with the surname Tiezzi, the largest self-reported group is White at 100.0%.
The bar chart below shows how Tiezzi 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 Tiezzi surname at the time of the 2020 Census, not any inherent property of the name itself.
- White100.0% · 107
Timeline
Historical Census data for Tiezzi
Tiezzi 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
#142,108
National surname rank
Recorded bearers 117
+15 bearers (+14.7%)
Per 100,000 0.04
Rank movement Up 6,136 places
2020
#151,639
National surname rank
Recorded bearers 107
-10 bearers (-8.5%)
Per 100,000 0.04
Rank movement Down 9,531 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #148,244 | 102 | 0.04 | First available Census row | First available Census row |
| 2010 | #142,108 | 117 | 0.04 | +15 bearers (+14.7%) | Up 6,136 places |
| 2020 | #151,639 | 107 | 0.04 | -10 bearers (-8.5%) | Down 9,531 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 Tiezzi 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 | #142,108 | #151,639 | -6.7% |
| Count | 117 | 107 | -8.5% |
| Per 100K | 0.04 | 0.04 | -10.5% |
Between the 2010 and 2020 Census, the number of Tiezzi bearers went from 117 to 107 (-8.5% change). The surname moved down 9,531 positions in the national ranking, going from #142,108 to #151,639.
FAQ
Tiezzi surname: questions and answers
How many people in the U.S. have the surname Tiezzi?
Name Census estimates that about 123 living Americans carry the surname Tiezzi. Using the current population baseline, that works out to roughly 1 in 2,786,621 residents.
How common is Tiezzi?
Tiezzi 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 Tiezzi. 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 Tiezzi.
Has Tiezzi become more or less common over time?
Between 2010 and 2020, the surname Tiezzi went from 117 recorded bearers to 107. That is a decrease of 10 (-8.5%). In the national ranking it fell from #142,108 to #151,639.
What does the Census say about the background of Tiezzi?
Among Census respondents with the surname Tiezzi, the largest self-reported group is White at 100.0%. 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 Tiezzi in the 2020 Census, accounting for 100.0% (107 people in the source table).
What is the full ancestry breakdown?
Tiezzi appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (100.0%). 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 Tiezzi (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 Tiezzi mean?
An Italian surname derived from place names in Tuscany and Umbria. 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 Tiezzi (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 people have the last name Tiezzi?
If you just want to know how common the surname Tiezzi is, HowManyOfMe.org gives you the headline number in one glance.