2000
#124,872
National surname rank
Recorded bearers 127
First available Census row
Per 100,000 0.05
Very Rare Last name
Mazzuchelli
An Italian surname derived from the dialect word "mazzuca" meaning a type of mace or club.
According to the 2020 US Census Bureau surname tables, roughly 125 Americans carry the last name Mazzuchelli. That puts it at #150,205 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,742,035 residents).
This page is the full Name Census profile for the Mazzuchelli 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
125
1 in 2,742,035
Census rank
#150,205
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
109
very rare in the US
Popularity narrative
The Census Bureau recorded 109 bearers of the surname Mazzuchelli in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 150205th position in the national surname ranking.
Among Census respondents with the surname Mazzuchelli, the largest self-reported group is White at 95.4%. The next largest groups are Hispanic (2.8%) and Black (0.9%).
Origin
Meaning and origin of Mazzuchelli
The surname Mazzuchelli is of Italian origin, specifically from the region of Lombardy in northern Italy. It dates back to the 12th century and is believed to be derived from the medieval Italian word "mazza," which means a club or mace. This suggests that the name may have originally referred to someone who was skilled in using a club or mace, perhaps a soldier or a member of a militia.
The earliest recorded instance of the name Mazzuchelli can be found in the Codex Diplomaticus Cremonae, a collection of historical documents from the city of Cremona, dating back to the year 1193. This mention refers to a certain Albertus Mazzuchelli, who was a landowner in the area.
In the 14th century, the name appears in the records of the city of Brescia, where a family by the name of Mazzuchelli held significant influence and power. One notable figure was Giovanni Mazzuchelli (c. 1360-1429), a renowned jurist and diplomat who served as a judge in Brescia and represented the city in negotiations with the Venetian Republic.
Another important historical figure bearing the name Mazzuchelli was Giammaria Mazzuchelli (1707-1765), an Italian scholar and bibliographer who authored the monumental work "Gli Scrittori d'Italia," a comprehensive bibliography of Italian writers and their works.
In the 19th century, the name Mazzuchelli gained prominence with the birth of Pietro Mazzuchelli (1800-1864), an Italian painter and engraver who is best known for his etchings of architectural subjects and landscapes.
The name Mazzuchelli has also been associated with various place names in northern Italy, such as the village of Mazzucchelli in the province of Brescia, which likely took its name from the prominent local family.
Throughout history, the Mazzuchelli surname has been found in various spellings, including Mazzuchelli, Mazucchelli, Mazzuchelli, and Mazzucchelli, reflecting the regional variations and dialectal differences in the Italian language.
Demographics
Ancestry and ethnicity for Mazzuchelli
Among Census respondents with the surname Mazzuchelli, the largest self-reported group is White at 95.4%. The next largest groups are Hispanic (2.8%) and Black (0.9%).
The bar chart below shows how Mazzuchelli 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 Mazzuchelli surname at the time of the 2020 Census, not any inherent property of the name itself.
- White95.4% · 104
- Hispanic or Latino2.8% · 3
- Black or African American0.9% · 1
- Two or more races0.9% · 1
Timeline
Historical Census data for Mazzuchelli
Mazzuchelli 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
#157,234
National surname rank
Recorded bearers 103
-24 bearers (-18.9%)
Per 100,000 0.03
Rank movement Down 32,362 places
2020
#150,205
National surname rank
Recorded bearers 109
+6 bearers (+5.8%)
Per 100,000 0.04
Rank movement Up 7,029 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #124,872 | 127 | 0.05 | First available Census row | First available Census row |
| 2010 | #157,234 | 103 | 0.03 | -24 bearers (-18.9%) | Down 32,362 places |
| 2020 | #150,205 | 109 | 0.04 | +6 bearers (+5.8%) | Up 7,029 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 Mazzuchelli 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 | #157,234 | #150,205 | 4.5% |
| Count | 103 | 109 | 5.8% |
| Per 100K | 0.03 | 0.04 | 21.6% |
Between the 2010 and 2020 Census, the number of Mazzuchelli bearers went from 103 to 109 (+5.8% change). The surname moved up 7,029 positions in the national ranking, going from #157,234 to #150,205.
FAQ
Mazzuchelli surname: questions and answers
How many people in the U.S. have the surname Mazzuchelli?
Name Census estimates that about 125 living Americans carry the surname Mazzuchelli. Using the current population baseline, that works out to roughly 1 in 2,742,035 residents.
How common is Mazzuchelli?
Mazzuchelli ranks #150,205 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 109 people with the surname Mazzuchelli. That is different from the site's living-bearer estimate (125), 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 Mazzuchelli.
Has Mazzuchelli become more or less common over time?
Between 2010 and 2020, the surname Mazzuchelli went from 103 recorded bearers to 109. That is an increase of 6 (+5.8%). In the national ranking it rose from #157,234 to #150,205.
What does the Census say about the background of Mazzuchelli?
Among Census respondents with the surname Mazzuchelli, the largest self-reported group is White at 95.4%. The next largest groups are Hispanic (2.8%) and Black (0.9%). 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 Mazzuchelli in the 2020 Census, accounting for 95.4% (104 people in the source table).
What is the full ancestry breakdown?
Mazzuchelli appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (95.4%), Hispanic (2.8%), Black (0.9%). 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 Mazzuchelli (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 Mazzuchelli mean?
An Italian surname derived from the dialect word "mazzuca" meaning a type of mace or club. 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 Mazzuchelli (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 share the surname Mazzuchelli?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.