2000
#110,523
National surname rank
Recorded bearers 148
First available Census row
Per 100,000 0.05
Very Rare Last name
Dupy
A French surname derived from the word "dupé" meaning deceived or cheated.
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Dupy. That puts it at #141,309 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,465,859 residents).
This page is the full Name Census profile for the Dupy 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
139
1 in 2,465,859
Census rank
#141,309
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
121
very rare in the US
Popularity narrative
The Census Bureau recorded 121 bearers of the surname Dupy in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 141309th position in the national surname ranking.
Among Census respondents with the surname Dupy, the largest self-reported group is White at 98.3%. The next largest groups are Two or More Races (1.7%).
Origin
Meaning and origin of Dupy
The surname DUPY has its origins in France, dating back to the Middle Ages. It is believed to have derived from the Old French word "dupe," meaning a gullible or easily deceived person. This name likely originated as a nickname for someone perceived as naive or easily misled.
The earliest recorded instances of the DUPY surname can be traced back to the 13th century in various regions of northern France, particularly in the areas of Normandy and Picardy. The name appears in several medieval records and documents, such as tax rolls, parish registers, and legal proceedings.
One of the earliest known bearers of the DUPY surname was Jean Dupy, a merchant from the town of Rouen in Normandy, who lived in the late 1200s. Another notable figure was Étienne Dupy, a farmer from the village of Amiens in Picardy, who was mentioned in a land survey conducted in the year 1312.
In the 15th century, the DUPY surname was also found in various spellings, such as Dupuy, Dupuis, and Dupé, reflecting the variations in pronunciation and orthography common during that era. These alternative spellings were often used interchangeably by different branches of the same family.
One of the earliest recorded instances of the DUPY surname in England can be traced back to the 16th century, when a family of Huguenot refugees fleeing religious persecution in France settled in the city of London. Among them was Pierre Dupy, a skilled weaver born in 1532 in the city of Lyon.
Throughout history, several notable individuals have borne the DUPY surname. These include:
1. Jacques Dupy (1555-1628), a French mathematician and astronomer who made significant contributions to the development of trigonometry.
2. Marie Dupy (1674-1742), a renowned French painter known for her portraits and still-life compositions.
3. Louis Dupy (1789-1861), a French general who served under Napoleon and played a crucial role in the Battle of Waterloo.
4. Émilie Dupy (1832-1898), a French feminist and activist who campaigned for women's rights and education.
5. Henri Dupy (1901-1978), a renowned French architect and urban planner responsible for designing several iconic buildings in Paris.
While the DUPY surname has its roots in France, it has since spread to various parts of the world, carried by individuals and families who emigrated from their homeland over the centuries.
Demographics
Ancestry and ethnicity for Dupy
Among Census respondents with the surname Dupy, the largest self-reported group is White at 98.3%. The next largest groups are Two or More Races (1.7%).
The bar chart below shows how Dupy 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 Dupy surname at the time of the 2020 Census, not any inherent property of the name itself.
- White98.3% · 119
- Two or more races1.7% · 2
Timeline
Historical Census data for Dupy
Dupy 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
#129,047
National surname rank
Recorded bearers 132
-16 bearers (-10.8%)
Per 100,000 0.04
Rank movement Down 18,524 places
2020
#141,309
National surname rank
Recorded bearers 121
-11 bearers (-8.3%)
Per 100,000 0.04
Rank movement Down 12,262 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #110,523 | 148 | 0.05 | First available Census row | First available Census row |
| 2010 | #129,047 | 132 | 0.04 | -16 bearers (-10.8%) | Down 18,524 places |
| 2020 | #141,309 | 121 | 0.04 | -11 bearers (-8.3%) | Down 12,262 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 Dupy 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 | #129,047 | #141,309 | -9.5% |
| Count | 132 | 121 | -8.3% |
| Per 100K | 0.04 | 0.04 | 1.2% |
Between the 2010 and 2020 Census, the number of Dupy bearers went from 132 to 121 (-8.3% change). The surname moved down 12,262 positions in the national ranking, going from #129,047 to #141,309.
FAQ
Dupy surname: questions and answers
How many people in the U.S. have the surname Dupy?
Name Census estimates that about 139 living Americans carry the surname Dupy. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Dupy?
Dupy ranks #141,309 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 121 people with the surname Dupy. That is different from the site's living-bearer estimate (139), 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 Dupy.
Has Dupy become more or less common over time?
Between 2010 and 2020, the surname Dupy went from 132 recorded bearers to 121. That is a decrease of 11 (-8.3%). In the national ranking it fell from #129,047 to #141,309.
What does the Census say about the background of Dupy?
Among Census respondents with the surname Dupy, the largest self-reported group is White at 98.3%. The next largest groups are Two or More Races (1.7%). 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 Dupy in the 2020 Census, accounting for 98.3% (119 people in the source table).
What is the full ancestry breakdown?
Dupy appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (98.3%), Two or More Races (1.7%). 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 Dupy (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 Dupy mean?
A French surname derived from the word "dupé" meaning deceived or cheated. 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 Dupy (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 Dupy?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.