2000
#140,756
National surname rank
Recorded bearers 109
First available Census row
Per 100,000 0.04
Very Rare Last name
Defurio
A surname derived from the Latin word "furiosus" meaning furious or raging.
According to the 2020 US Census Bureau surname tables, roughly 127 Americans carry the last name Defurio. That puts it at #148,665 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,698,853 residents).
This page is the full Name Census profile for the Defurio 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
127
1 in 2,698,853
Census rank
#148,665
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
111
very rare in the US
Popularity narrative
The Census Bureau recorded 111 bearers of the surname Defurio in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 148665th position in the national surname ranking.
Among Census respondents with the surname Defurio, the largest self-reported group is White at 97.3%. The next largest groups are Hispanic (0.9%) and Asian/Pacific Islander (0.9%).
Origin
Meaning and origin of Defurio
The surname DEFURIO is believed to have originated in Italy during the medieval period. The name appears to be derived from the Latin phrase "de furio," which means "of fury" or "of passion." This suggests that the name may have been initially assigned as a descriptive nickname or reference to someone with a fiery or intense personality.
One of the earliest recorded instances of the DEFURIO name can be found in a 13th-century manuscript from the Tuscan region of Italy. This document mentions a merchant named Giulio DEFURIO, who was involved in trade between Florence and Venice during the early Renaissance era.
In the 15th century, the DEFURIO name appears in several records from the city of Naples. These records indicate that a noble family bearing this surname held significant influence and wealth in the region during that time period. One notable member was Antonio DEFURIO (1422-1498), a prominent lawyer and advisor to the Neapolitan court.
The DEFURIO surname also has ties to the island of Sicily. In the 16th century, a military officer named Vincenzo DEFURIO (1520-1589) gained recognition for his bravery and leadership during the Ottoman-Venetian War. He was awarded lands and titles by the Spanish crown for his service.
Another significant figure in the history of the DEFURIO name was Maria DEFURIO (1647-1718), a renowned painter from Rome whose works were highly sought after by the Catholic Church and wealthy patrons of the arts during the Baroque era.
In the 19th century, a playwright and poet named Giuseppe DEFURIO (1810-1872) achieved literary acclaim in his native city of Milan. His plays and poetry often explored themes of passion, love, and the human condition, perhaps reflecting the fiery nature associated with the DEFURIO name.
While the DEFURIO surname has its roots in Italy, it has since spread to other parts of the world through migration and intermarriage. However, its origins and historical significance remain firmly rooted in the rich cultural and linguistic heritage of the Italian peninsula.
Demographics
Ancestry and ethnicity for Defurio
Among Census respondents with the surname Defurio, the largest self-reported group is White at 97.3%. The next largest groups are Hispanic (0.9%) and Asian/Pacific Islander (0.9%).
The bar chart below shows how Defurio 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 Defurio surname at the time of the 2020 Census, not any inherent property of the name itself.
- White97.3% · 108
- Hispanic or Latino0.9% · 1
- Asian and Pacific Islander0.9% · 1
- Two or more races0.9% · 1
Timeline
Historical Census data for Defurio
Defurio 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
#147,253
National surname rank
Recorded bearers 112
+3 bearers (+2.8%)
Per 100,000 0.04
Rank movement Down 6,497 places
2020
#148,665
National surname rank
Recorded bearers 111
-1 bearers (-0.9%)
Per 100,000 0.04
Rank movement Down 1,412 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #140,756 | 109 | 0.04 | First available Census row | First available Census row |
| 2010 | #147,253 | 112 | 0.04 | +3 bearers (+2.8%) | Down 6,497 places |
| 2020 | #148,665 | 111 | 0.04 | -1 bearers (-0.9%) | Down 1,412 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 Defurio 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 | #147,253 | #148,665 | -1.0% |
| Count | 112 | 111 | -0.9% |
| Per 100K | 0.04 | 0.04 | -7.2% |
Between the 2010 and 2020 Census, the number of Defurio bearers went from 112 to 111 (-0.9% change). The surname moved down 1,412 positions in the national ranking, going from #147,253 to #148,665.
FAQ
Defurio surname: questions and answers
How many people in the U.S. have the surname Defurio?
Name Census estimates that about 127 living Americans carry the surname Defurio. Using the current population baseline, that works out to roughly 1 in 2,698,853 residents.
How common is Defurio?
Defurio ranks #148,665 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 111 people with the surname Defurio. That is different from the site's living-bearer estimate (127), 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 Defurio.
Has Defurio become more or less common over time?
Between 2010 and 2020, the surname Defurio went from 112 recorded bearers to 111. That is a decrease of 1 (-0.9%). In the national ranking it fell from #147,253 to #148,665.
What does the Census say about the background of Defurio?
Among Census respondents with the surname Defurio, the largest self-reported group is White at 97.3%. The next largest groups are Hispanic (0.9%) and Asian/Pacific Islander (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 Defurio in the 2020 Census, accounting for 97.3% (108 people in the source table).
What is the full ancestry breakdown?
Defurio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (97.3%), Hispanic (0.9%), Asian/Pacific Islander (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 Defurio (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 Defurio mean?
A surname derived from the Latin word "furiosus" meaning furious or raging. 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 Defurio (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 Defurio?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.