2000
#131,366
National surname rank
Recorded bearers 119
First available Census row
Per 100,000 0.04
Very Rare Last name
Dilluvio
An Italian surname meaning "the deluge" or "flood".
According to the 2020 US Census Bureau surname tables, roughly 131 Americans carry the last name Dilluvio. That puts it at #146,495 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,616,445 residents).
This page is the full Name Census profile for the Dilluvio 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
131
1 in 2,616,445
Census rank
#146,495
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
114
very rare in the US
Popularity narrative
The Census Bureau recorded 114 bearers of the surname Dilluvio in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 146495th position in the national surname ranking.
Among Census respondents with the surname Dilluvio, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (7.9%) and Two or More Races (0.9%).
Origin
Meaning and origin of Dilluvio
The surname DILLUVIO is of Italian origin, originating in the region of Tuscany during the late medieval period. It is believed to be derived from the Italian phrase "di luvio," which translates to "of the flood" or "of the deluge." This suggests that the name may have been originally bestowed upon an individual or family residing near a river or area prone to flooding.
One of the earliest recorded instances of the DILLUVIO name can be found in the archives of the city of Florence, dating back to the 14th century. A merchant named Giacomo DILLUVIO is mentioned in a document from 1378, indicating that the name was already established in the region at that time.
In the 16th century, records show that a prominent family bearing the DILLUVIO name owned a vineyard near the town of Montepulciano, renowned for its wine production. This suggests that the name may have also been associated with agricultural pursuits during this period.
During the Renaissance, the DILLUVIO name gained notable recognition through the works of the renowned Italian artist and architect, Filippo DILLUVIO (1457-1519). Born in Siena, he was commissioned by various noble families and the Catholic Church to design and construct several prominent buildings, including the Church of Santa Maria delle Grazie in Arezzo.
Another notable individual with the DILLUVIO surname was Giuseppe DILLUVIO (1680-1755), a Florentine scholar and theologian. He authored several religious texts and served as a professor of philosophy at the University of Pisa.
In the 19th century, a branch of the DILLUVIO family migrated to the island of Sicily, where they established themselves as successful olive oil producers. One member of this branch, Vincenzo DILLUVIO (1825-1901), was a prominent figure in the Sicilian independence movement and advocated for the unification of Italy.
While the DILLUVIO name has its roots in Italy, it has since spread to various parts of the world through migration and intermarriage. However, the historical records and individuals mentioned above provide insight into the rich heritage and origins of this surname.
Demographics
Ancestry and ethnicity for Dilluvio
Among Census respondents with the surname Dilluvio, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (7.9%) and Two or More Races (0.9%).
The bar chart below shows how Dilluvio 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 Dilluvio surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.2% · 104
- Hispanic or Latino7.9% · 9
- Two or more races0.9% · 1
Timeline
Historical Census data for Dilluvio
Dilluvio 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
#129,825
National surname rank
Recorded bearers 131
+12 bearers (+10.1%)
Per 100,000 0.04
Rank movement Up 1,541 places
2020
#146,495
National surname rank
Recorded bearers 114
-17 bearers (-13.0%)
Per 100,000 0.04
Rank movement Down 16,670 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #131,366 | 119 | 0.04 | First available Census row | First available Census row |
| 2010 | #129,825 | 131 | 0.04 | +12 bearers (+10.1%) | Up 1,541 places |
| 2020 | #146,495 | 114 | 0.04 | -17 bearers (-13.0%) | Down 16,670 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 Dilluvio 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 | #129,825 | #146,495 | -12.8% |
| Count | 131 | 114 | -13.0% |
| Per 100K | 0.04 | 0.04 | -4.6% |
Between the 2010 and 2020 Census, the number of Dilluvio bearers went from 131 to 114 (-13.0% change). The surname moved down 16,670 positions in the national ranking, going from #129,825 to #146,495.
FAQ
Dilluvio surname: questions and answers
How many people in the U.S. have the surname Dilluvio?
Name Census estimates that about 131 living Americans carry the surname Dilluvio. Using the current population baseline, that works out to roughly 1 in 2,616,445 residents.
How common is Dilluvio?
Dilluvio ranks #146,495 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 114 people with the surname Dilluvio. That is different from the site's living-bearer estimate (131), 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 Dilluvio.
Has Dilluvio become more or less common over time?
Between 2010 and 2020, the surname Dilluvio went from 131 recorded bearers to 114. That is a decrease of 17 (-13.0%). In the national ranking it fell from #129,825 to #146,495.
What does the Census say about the background of Dilluvio?
Among Census respondents with the surname Dilluvio, the largest self-reported group is White at 91.2%. The next largest groups are Hispanic (7.9%) and Two or More Races (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 Dilluvio in the 2020 Census, accounting for 91.2% (104 people in the source table).
What is the full ancestry breakdown?
Dilluvio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.2%), Hispanic (7.9%), Two or More Races (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 Dilluvio (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 Dilluvio mean?
An Italian surname meaning "the deluge" or "flood". 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 Dilluvio (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 surname Dilluvio?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.