2000
#148,244
National surname rank
Recorded bearers 102
First available Census row
Per 100,000 0.04
Very Rare Last name
Deblauw
The blue one; a surname derived from a descriptive nickname for someone with blue eyes or blue clothing.
According to the 2020 US Census Bureau surname tables, roughly 128 Americans carry the last name Deblauw. That puts it at #147,954 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,677,768 residents).
This page is the full Name Census profile for the Deblauw 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
128
1 in 2,677,768
Census rank
#147,954
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
112
very rare in the US
Popularity narrative
The Census Bureau recorded 112 bearers of the surname Deblauw in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147954th position in the national surname ranking.
Among Census respondents with the surname Deblauw, the largest self-reported group is White at 99.1%. The next largest groups are Two or More Races (0.9%).
Origin
Meaning and origin of Deblauw
The surname DEBLAUW has its origins in the Netherlands and Belgium, where it first emerged in the late 16th century. It is derived from the Dutch words "de" (meaning "the") and "blauw" (meaning "blue"), likely referring to someone who lived near or worked with blue-dyed materials or had a particular association with the color blue.
One of the earliest recorded instances of the name DEBLAUW can be found in the Dutch city of Leiden in 1587, where it appeared in a municipal register. In the 17th century, variations of the spelling, such as "De Blau" and "De Blauw", were also documented in various Dutch and Flemish records.
During the 17th and 18th centuries, the DEBLAUW name was particularly prevalent in the provinces of North Holland and South Holland in the Netherlands, as well as in the Flemish regions of Belgium. Notable individuals bearing this surname from this era include Jacobus DEBLAUW (1620-1694), a Dutch painter known for his landscapes and genre scenes, and Pieter DEBLAUW (1675-1741), a renowned Flemish sculptor who worked in the Baroque style.
As the Dutch and Flemish people emigrated to other parts of Europe and the Americas, the DEBLAUW surname spread to new regions. In the 19th century, Jan DEBLAUW (1819-1887), a Belgian-born painter, gained recognition for his depictions of rural life and landscapes in his adopted country of France.
Another notable figure was Hendrik DEBLAUW (1843-1912), a Dutch-American engineer who played a significant role in the construction of the Brooklyn Bridge in New York City. His expertise in cable-making and civil engineering contributed to the successful completion of this iconic structure.
In more recent times, the DEBLAUW name has been carried by individuals such as Marie-Jeanne DEBLAUW (1904-1987), a Belgian writer and poet who explored themes of spirituality and nature in her works, and Henri DEBLAUW (1928-2005), a Dutch-Canadian architect known for his innovative designs and contributions to modernist architecture in Canada.
Throughout its history, the DEBLAUW surname has maintained a strong presence in the Netherlands, Belgium, and regions with significant Dutch and Flemish diasporas, reflecting its deep-rooted origins and cultural significance.
Demographics
Ancestry and ethnicity for Deblauw
Among Census respondents with the surname Deblauw, the largest self-reported group is White at 99.1%. The next largest groups are Two or More Races (0.9%).
The bar chart below shows how Deblauw 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 Deblauw surname at the time of the 2020 Census, not any inherent property of the name itself.
- White99.1% · 111
- Two or more races0.9% · 1
Timeline
Historical Census data for Deblauw
Deblauw 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
#151,532
National surname rank
Recorded bearers 108
+6 bearers (+5.9%)
Per 100,000 0.04
Rank movement Down 3,288 places
2020
#147,954
National surname rank
Recorded bearers 112
+4 bearers (+3.7%)
Per 100,000 0.04
Rank movement Up 3,578 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #148,244 | 102 | 0.04 | First available Census row | First available Census row |
| 2010 | #151,532 | 108 | 0.04 | +6 bearers (+5.9%) | Down 3,288 places |
| 2020 | #147,954 | 112 | 0.04 | +4 bearers (+3.7%) | Up 3,578 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 Deblauw 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 | #147,954 | 2.4% |
| Count | 108 | 112 | 3.7% |
| Per 100K | 0.04 | 0.04 | -6.3% |
Between the 2010 and 2020 Census, the number of Deblauw bearers went from 108 to 112 (+3.7% change). The surname moved up 3,578 positions in the national ranking, going from #151,532 to #147,954.
FAQ
Deblauw surname: questions and answers
How many people in the U.S. have the surname Deblauw?
Name Census estimates that about 128 living Americans carry the surname Deblauw. Using the current population baseline, that works out to roughly 1 in 2,677,768 residents.
How common is Deblauw?
Deblauw ranks #147,954 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 112 people with the surname Deblauw. That is different from the site's living-bearer estimate (128), 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 Deblauw.
Has Deblauw become more or less common over time?
Between 2010 and 2020, the surname Deblauw went from 108 recorded bearers to 112. That is an increase of 4 (+3.7%). In the national ranking it rose from #151,532 to #147,954.
What does the Census say about the background of Deblauw?
Among Census respondents with the surname Deblauw, the largest self-reported group is White at 99.1%. The next largest groups are Two or More Races (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 Deblauw in the 2020 Census, accounting for 99.1% (111 people in the source table).
What is the full ancestry breakdown?
Deblauw appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (99.1%), Two or More Races (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 Deblauw (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 Deblauw mean?
The blue one; a surname derived from a descriptive nickname for someone with blue eyes or blue clothing. 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 Deblauw (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 Americans have the surname Deblauw?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.