2000
#144,908
National surname rank
Recorded bearers 105
First available Census row
Per 100,000 0.04
Very Rare Last name
Deranleau
A French surname derived from a place name, possibly associated with a location near running water.
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Deranleau. 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 Deranleau 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 Deranleau 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 Deranleau, the largest self-reported group is White at 87.6%. The next largest groups are Two or More Races (6.6%) and American Indian/Alaska Native (4.1%).
Origin
Meaning and origin of Deranleau
The surname DERANLEAU originated in France, specifically in the northern region of Normandy, during the 11th century. It is derived from the Old French words "de" meaning "from" and "ranleaux" referring to a small hamlet or settlement. This suggests that the earliest bearers of this name likely hailed from a particular place called Ranleaux.
One of the earliest recorded mentions of the DERANLEAU name can be found in the Doomsday Book of 1086, a comprehensive survey of land ownership and values commissioned by William the Conqueror. Here, the name appears as "de Ranleaux," indicating its Norman origins and the family's association with the namesake location.
In the 13th century, a notable figure bearing the DERANLEAU name was Jacques de Ranleaux, a knight who participated in the Seventh Crusade led by King Louis IX of France. Jacques' exploits were documented in various chronicles of the time, cementing the family's reputation as loyal warriors.
During the 16th century, the DERANLEAU name underwent a slight spelling variation, appearing as "Deranleaux" in several municipal records from the town of Rouen. One prominent individual from this era was Pierre Deranleaux (1518-1592), a respected merchant and alderman who played a significant role in the city's governance.
As the centuries passed, members of the DERANLEAU family continued to make their mark in various fields. In the late 18th century, Marie-Antoinette Deranleau (1756-1832) gained recognition as a talented painter and portraitist, whose works were exhibited at the prestigious Salon de Paris.
Another noteworthy figure was Louis Deranleau (1810-1878), a renowned architect who designed several iconic buildings in Paris, including the Palais Garnier, home of the famous Opéra de Paris.
Throughout its long history, the DERANLEAU name has been associated with various locations within France, such as Normandy, Rouen, and Paris. While its spelling may have evolved slightly over time, the name's essence and connection to its Norman roots have remained intact.
Demographics
Ancestry and ethnicity for Deranleau
Among Census respondents with the surname Deranleau, the largest self-reported group is White at 87.6%. The next largest groups are Two or More Races (6.6%) and American Indian/Alaska Native (4.1%).
The bar chart below shows how Deranleau 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 Deranleau surname at the time of the 2020 Census, not any inherent property of the name itself.
- White87.6% · 106
- Two or more races6.6% · 8
- American Indian and Alaska Native4.1% · 5
- Black or African American0.8% · 1
- Asian and Pacific Islander0.8% · 1
Timeline
Historical Census data for Deranleau
Deranleau 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
+27 bearers (+25.7%)
Per 100,000 0.04
Rank movement Up 15,861 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 | #144,908 | 105 | 0.04 | First available Census row | First available Census row |
| 2010 | #129,047 | 132 | 0.04 | +27 bearers (+25.7%) | Up 15,861 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 Deranleau 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 Deranleau 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
Deranleau surname: questions and answers
How many people in the U.S. have the surname Deranleau?
Name Census estimates that about 139 living Americans carry the surname Deranleau. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Deranleau?
Deranleau 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 Deranleau. 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 Deranleau.
Has Deranleau become more or less common over time?
Between 2010 and 2020, the surname Deranleau 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 Deranleau?
Among Census respondents with the surname Deranleau, the largest self-reported group is White at 87.6%. The next largest groups are Two or More Races (6.6%) and American Indian/Alaska Native (4.1%). 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 Deranleau in the 2020 Census, accounting for 87.6% (106 people in the source table).
What is the full ancestry breakdown?
Deranleau appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (87.6%), Two or More Races (6.6%), American Indian/Alaska Native (4.1%). 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 Deranleau (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 Deranleau mean?
A French surname derived from a place name, possibly associated with a location near running water. 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 Deranleau (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 common is the surname Deranleau?
If you just want to know how many Americans have the surname Deranleau, HowManyOfMe.org gives you the headline number in one glance.