2010
#148,347
National surname rank
Recorded bearers 111
First available Census row
Per 100,000 0.04
Very Rare Last name
Genzano
A locational surname derived from the town of Genzano in Italy.
According to the 2020 US Census Bureau surname tables, roughly 132 Americans carry the last name Genzano. That puts it at #145,757 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,596,624 residents).
This page is the full Name Census profile for the Genzano 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
132
1 in 2,596,624
Census rank
#145,757
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
115
very rare in the US
Popularity narrative
The Census Bureau recorded 115 bearers of the surname Genzano in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 145757th position in the national surname ranking.
Among Census respondents with the surname Genzano, the largest self-reported group is White at 87.8%. The next largest groups are Hispanic (7.0%) and Two or More Races (3.5%).
Origin
Meaning and origin of Genzano
The surname Genzano originates from Italy, specifically the town of Genzano di Roma located in the province of Rome, Lazio region. The name is derived from the Latin word "Gentianus," which refers to the Roman gens (clan) that once inhabited the area.
Genzano was first documented in historical records dating back to the 12th century, appearing in various medieval manuscripts and chronicles. One notable mention can be found in the "Codice Diplomatico" of the Conti Tusculani, a collection of documents from the 11th and 12th centuries related to the powerful Counts of Tusculum.
The earliest recorded bearer of the surname Genzano was Petrus de Genzano, a nobleman mentioned in a document from 1150. Later, in the 13th century, a family by the name of Genzano di Roma emerged as influential landowners and nobles in the region.
In the 14th century, a branch of the Genzano family settled in nearby towns, leading to variations in the spelling of the name, such as Genzani and Genzanelli. During this time, the name appeared in various municipal records and property deeds.
One notable figure was Giovanni Battista Genzano (1567-1635), a renowned painter and architect who contributed to the construction of several churches and palaces in Rome during the Renaissance period.
Another prominent individual was Vincenzo Genzano (1706-1783), a Baroque composer and violinist who served as the Maestro di Cappella at the Basilica of St. Peter's in Vatican City.
In the 19th century, Giuseppe Genzano (1825-1892) was a celebrated Italian patriot and revolutionary who fought alongside Giuseppe Garibaldi in the Expedition of the Thousand, contributing to the unification of Italy.
During the same period, Emilia Genzano (1838-1912) was a respected educator and feminist who advocated for women's rights and established several schools for girls in the region of Lazio.
Lastly, Antonio Genzano (1892-1967) was a prominent Italian politician and lawyer who served as a deputy in the Italian Parliament and was instrumental in drafting several important legislative reforms in the post-World War II era.
Demographics
Ancestry and ethnicity for Genzano
Among Census respondents with the surname Genzano, the largest self-reported group is White at 87.8%. The next largest groups are Hispanic (7.0%) and Two or More Races (3.5%).
The bar chart below shows how Genzano 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 Genzano surname at the time of the 2020 Census, not any inherent property of the name itself.
- White87.8% · 101
- Hispanic or Latino7.0% · 8
- Two or more races3.5% · 4
- Asian and Pacific Islander1.7% · 2
Timeline
Historical Census data for Genzano
Genzano appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#145,757
National surname rank
Recorded bearers 115
+4 bearers (+3.6%)
Per 100,000 0.04
Rank movement Up 2,590 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #148,347 | 111 | 0.04 | First available Census row | First available Census row |
| 2020 | #145,757 | 115 | 0.04 | +4 bearers (+3.6%) | Up 2,590 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 Genzano 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 | #148,347 | #145,757 | 1.7% |
| Count | 111 | 115 | 3.6% |
| Per 100K | 0.04 | 0.04 | -3.8% |
Between the 2010 and 2020 Census, the number of Genzano bearers went from 111 to 115 (+3.6% change). The surname moved up 2,590 positions in the national ranking, going from #148,347 to #145,757.
FAQ
Genzano surname: questions and answers
How many people in the U.S. have the surname Genzano?
Name Census estimates that about 132 living Americans carry the surname Genzano. Using the current population baseline, that works out to roughly 1 in 2,596,624 residents.
How common is Genzano?
Genzano ranks #145,757 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 115 people with the surname Genzano. That is different from the site's living-bearer estimate (132), 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 Genzano.
Has Genzano become more or less common over time?
Between 2010 and 2020, the surname Genzano went from 111 recorded bearers to 115. That is an increase of 4 (+3.6%). In the national ranking it rose from #148,347 to #145,757.
What does the Census say about the background of Genzano?
Among Census respondents with the surname Genzano, the largest self-reported group is White at 87.8%. The next largest groups are Hispanic (7.0%) and Two or More Races (3.5%). 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 Genzano in the 2020 Census, accounting for 87.8% (101 people in the source table).
What is the full ancestry breakdown?
Genzano appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (87.8%), Hispanic (7.0%), Two or More Races (3.5%). 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 Genzano (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 Genzano mean?
A locational surname derived from the town of Genzano in Italy. 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 Genzano (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 Americans have the surname Genzano?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.