2000
#123,314
National surname rank
Recorded bearers 129
First available Census row
Per 100,000 0.05
Very Rare Last name
Deflumeri
Of Italian origin, meaning "from the flower" or possibly related to river names.
According to the 2020 US Census Bureau surname tables, roughly 119 Americans carry the last name Deflumeri. That puts it at #153,590 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,880,289 residents).
This page is the full Name Census profile for the Deflumeri 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
119
1 in 2,880,289
Census rank
#153,590
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
104
very rare in the US
Popularity narrative
The Census Bureau recorded 104 bearers of the surname Deflumeri in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 153590th position in the national surname ranking.
Among Census respondents with the surname Deflumeri, the largest self-reported group is White at 98.1%. The next largest groups are Hispanic (1.9%).
Origin
Meaning and origin of Deflumeri
The surname DEFLUMERI has its origins in Italy, specifically in the region of Campania. It first emerged during the late medieval period, around the 13th or 14th century. The name is believed to derive from the Latin phrase "de fluminibus," which translates to "of the rivers" or "from the rivers." This suggests that the earliest bearers of this surname may have resided near a significant river or waterway.
One of the earliest recorded instances of the DEFLUMERI surname can be found in the archives of the city of Naples, dating back to the late 15th century. A document from 1487 mentions a certain Giovanni DEFLUMERI, a merchant involved in the thriving trade between Naples and other Mediterranean ports.
The DEFLUMERI name appears to have been particularly prevalent in the town of Salerno, located in the province of Campania. In the 16th century, there are records of a family of artisans and craftsmen bearing this surname. Notably, a certain Pietro DEFLUMERI (1528-1598) was a respected sculptor who contributed to the decoration of several churches and palaces in the region.
As the centuries passed, the DEFLUMERI surname spread to other parts of Italy, with some notable individuals emerging. One such figure was Girolamo DEFLUMERI (1680-1745), a renowned painter from Rome who specialized in religious and mythological scenes. His works can still be found in various churches and galleries across the country.
Another notable bearer of the DEFLUMERI name was Antonio DEFLUMERI (1792-1865), a lawyer and politician who served as a member of the Parliament of the Kingdom of the Two Sicilies in the mid-19th century. He was a vocal advocate for legal reforms and civil rights during a tumultuous period in Italian history.
In more recent times, the DEFLUMERI surname has been associated with the world of academia. Notably, Professor Emilio DEFLUMERI (1914-2002) was a respected historian and author, specializing in the study of medieval Italy. His numerous publications and contributions to the field have left a lasting impact on the understanding of Italian history.
While the DEFLUMERI surname may not be as common as some other Italian surnames, it has a rich and diverse history that spans centuries. From merchants and artisans to politicians and scholars, this name has left its mark on various aspects of Italian society and culture.
Demographics
Ancestry and ethnicity for Deflumeri
Among Census respondents with the surname Deflumeri, the largest self-reported group is White at 98.1%. The next largest groups are Hispanic (1.9%).
The bar chart below shows how Deflumeri 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 Deflumeri surname at the time of the 2020 Census, not any inherent property of the name itself.
- White98.1% · 102
- Hispanic or Latino1.9% · 2
Timeline
Historical Census data for Deflumeri
Deflumeri 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
#144,141
National surname rank
Recorded bearers 115
-14 bearers (-10.9%)
Per 100,000 0.04
Rank movement Down 20,827 places
2020
#153,590
National surname rank
Recorded bearers 104
-11 bearers (-9.6%)
Per 100,000 0.03
Rank movement Down 9,449 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #123,314 | 129 | 0.05 | First available Census row | First available Census row |
| 2010 | #144,141 | 115 | 0.04 | -14 bearers (-10.9%) | Down 20,827 places |
| 2020 | #153,590 | 104 | 0.03 | -11 bearers (-9.6%) | Down 9,449 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 Deflumeri 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 | #144,141 | #153,590 | -6.6% |
| Count | 115 | 104 | -9.6% |
| Per 100K | 0.04 | 0.03 | -13.0% |
Between the 2010 and 2020 Census, the number of Deflumeri bearers went from 115 to 104 (-9.6% change). The surname moved down 9,449 positions in the national ranking, going from #144,141 to #153,590.
FAQ
Deflumeri surname: questions and answers
How many people in the U.S. have the surname Deflumeri?
Name Census estimates that about 119 living Americans carry the surname Deflumeri. Using the current population baseline, that works out to roughly 1 in 2,880,289 residents.
How common is Deflumeri?
Deflumeri ranks #153,590 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 104 people with the surname Deflumeri. That is different from the site's living-bearer estimate (119), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Deflumeri.
Has Deflumeri become more or less common over time?
Between 2010 and 2020, the surname Deflumeri went from 115 recorded bearers to 104. That is a decrease of 11 (-9.6%). In the national ranking it fell from #144,141 to #153,590.
What does the Census say about the background of Deflumeri?
Among Census respondents with the surname Deflumeri, the largest self-reported group is White at 98.1%. The next largest groups are Hispanic (1.9%). 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 Deflumeri in the 2020 Census, accounting for 98.1% (102 people in the source table).
What is the full ancestry breakdown?
Deflumeri appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (98.1%), Hispanic (1.9%). 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 Deflumeri (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 Deflumeri mean?
Of Italian origin, meaning "from the flower" or possibly related to river names. 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 Deflumeri (0.03 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 Deflumeri?
See how many people have the surname Deflumeri on HowManyOfMe.org, our sister site built around that single question.