2010
#151,532
National surname rank
Recorded bearers 108
First available Census row
Per 100,000 0.04
Very Rare Last name
Duplechan
A name derived from French words meaning "double oak tree".
According to the 2020 US Census Bureau surname tables, roughly 123 Americans carry the last name Duplechan. That puts it at #151,639 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,786,621 residents).
This page is the full Name Census profile for the Duplechan 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
123
1 in 2,786,621
Census rank
#151,639
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
107
very rare in the US
Popularity narrative
The Census Bureau recorded 107 bearers of the surname Duplechan in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 151639th position in the national surname ranking.
Among Census respondents with the surname Duplechan, the largest self-reported group is Black at 64.5%. The next largest groups are White (20.6%) and Two or More Races (8.4%).
Origin
Meaning and origin of Duplechan
The surname DUPLECHAN originated in the northern regions of France, particularly in the Normandy region. The name dates back to the 11th century, around the time of the Norman conquest of England in 1066. DUPLECHAN is derived from the Old French words "du" meaning "from" and "plesseiz" meaning "thicket" or "hedge". It is believed to have referred to someone who lived near a dense area of vegetation or a hedgerow.
One of the earliest recorded instances of the name DUPLECHAN can be found in the Domesday Book of 1086, a comprehensive survey of landowners and properties in England commissioned by William the Conqueror. The name appears as "Radulfus de Plesseto", referring to a Norman landowner in the county of Essex.
In the 13th century, a notable figure bearing the name DUPLECHAN was Sir Robert Duplechan, a knight who fought in the Crusades under Richard the Lionheart. Sir Robert was born in 1175 and died in 1245.
During the 14th century, the name DUPLECHAN evolved into various spellings, such as "Duplessis" and "Duplessix". One notable bearer of this variant was Jean Duplessis, a French nobleman and military commander who served under King Charles VI. Jean Duplessis was born in 1355 and died in 1419.
In the 16th century, a prominent member of the DUPLECHAN family was Jacques Duplechan, a French explorer and cartographer. Jacques is credited with mapping parts of the Gulf of St. Lawrence and the eastern coast of Canada in the 1530s.
Another notable figure from this period was Marie Duplechan, a French noblewoman and patron of the arts. Marie was born in 1560 and played a significant role in supporting the arts and literature during the Renaissance era.
During the 17th century, the DUPLECHAN name continued to be prominent in France. One notable bearer was Pierre Duplechan, a French philosopher and theologian who wrote extensively on metaphysics and ethics. Pierre was born in 1620 and died in 1698.
As the centuries passed, the DUPLECHAN surname spread to other parts of Europe and eventually to other continents through migration and exploration. While the name has evolved through various spellings and pronunciations over time, its origins can be traced back to the northern regions of France, where it first emerged as a descriptive surname in the 11th century.
Demographics
Ancestry and ethnicity for Duplechan
Among Census respondents with the surname Duplechan, the largest self-reported group is Black at 64.5%. The next largest groups are White (20.6%) and Two or More Races (8.4%).
The bar chart below shows how Duplechan 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 Duplechan surname at the time of the 2020 Census, not any inherent property of the name itself.
- Black or African American64.5% · 69
- White20.6% · 22
- Two or more races8.4% · 9
- Hispanic or Latino5.6% · 6
- Asian and Pacific Islander0.9% · 1
Timeline
Historical Census data for Duplechan
Duplechan 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
#151,639
National surname rank
Recorded bearers 107
-1 bearers (-0.9%)
Per 100,000 0.04
Rank movement Down 107 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #151,532 | 108 | 0.04 | First available Census row | First available Census row |
| 2020 | #151,639 | 107 | 0.04 | -1 bearers (-0.9%) | Down 107 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 Duplechan 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 | #151,532 | #151,639 | -0.1% |
| Count | 108 | 107 | -0.9% |
| Per 100K | 0.04 | 0.04 | -10.5% |
Between the 2010 and 2020 Census, the number of Duplechan bearers went from 108 to 107 (-0.9% change). The surname moved down 107 positions in the national ranking, going from #151,532 to #151,639.
FAQ
Duplechan surname: questions and answers
How many people in the U.S. have the surname Duplechan?
Name Census estimates that about 123 living Americans carry the surname Duplechan. Using the current population baseline, that works out to roughly 1 in 2,786,621 residents.
How common is Duplechan?
Duplechan ranks #151,639 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 107 people with the surname Duplechan. That is different from the site's living-bearer estimate (123), 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 Duplechan.
Has Duplechan become more or less common over time?
Between 2010 and 2020, the surname Duplechan went from 108 recorded bearers to 107. That is a decrease of 1 (-0.9%). In the national ranking it fell from #151,532 to #151,639.
What does the Census say about the background of Duplechan?
Among Census respondents with the surname Duplechan, the largest self-reported group is Black at 64.5%. The next largest groups are White (20.6%) and Two or More Races (8.4%). 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?
Black is the largest self-reported group for the surname Duplechan in the 2020 Census, accounting for 64.5% (69 people in the source table).
What is the full ancestry breakdown?
Duplechan appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Black (64.5%), White (20.6%), Two or More Races (8.4%). 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 Duplechan (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 Duplechan mean?
A name derived from French words meaning "double oak tree". 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 Duplechan (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 Duplechan?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.