2000
#122,534
National surname rank
Recorded bearers 130
First available Census row
Per 100,000 0.05
Very Rare Last name
Delooze
The name is derived from a diminutive form of a surname meaning "of Loos" or "from Loos."
According to the 2020 US Census Bureau surname tables, roughly 134 Americans carry the last name Delooze. That puts it at #144,270 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,557,868 residents).
This page is the full Name Census profile for the Delooze 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.
For British records, Name Census UK has a British surname profile for Delooze with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
134
1 in 2,557,868
Census rank
#144,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
117
very rare in the US
Popularity narrative
The Census Bureau recorded 117 bearers of the surname Delooze in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 144270th position in the national surname ranking.
Among Census respondents with the surname Delooze, the largest self-reported group is White at 94.9%. The next largest groups are American Indian/Alaska Native (2.6%) and Two or More Races (1.7%).
Origin
Meaning and origin of Delooze
The surname DELOOZE originates from the Netherlands, with the earliest records dating back to the late 16th century. It is believed to have derived from the Dutch words "de" meaning "the" and "looze" meaning "loose" or "unbound." This could potentially indicate an ancestor who was known for their free-spirited or unconventional ways.
In the 17th century, variations of the name such as "de Looze," "de Loze," and "Deloos" can be found in various Dutch records and manuscripts. The name was particularly prevalent in the provinces of North Brabant and Gelderland.
One of the earliest recorded instances of the name DELOOZE can be found in a baptismal record from the year 1612 in the city of Eindhoven, where a child named Joost Delooze was born to parents Hendrik and Maria.
During the Dutch Golden Age in the 17th century, a renowned painter named Pieter Delooze (1633-1709) gained recognition for his landscapes and still-life paintings. His works can be found in various museums across the Netherlands and Europe.
In the late 18th century, a notable figure named Adriaan DELOOZE (1768-1842) made a name for himself as a prominent mathematician and astronomer. He served as a professor at the University of Leiden and made significant contributions to the field of celestial mechanics.
As the Dutch colonized parts of the Americas, the name DELOOZE also found its way to the New World. One of the earliest recorded instances in North America is that of Cornelis DELOOZE, who settled in New Amsterdam (present-day New York City) in the mid-17th century.
In the 19th century, a Belgian philosopher and writer named Henri DELOOZE (1825-1892) gained recognition for his works exploring the concept of individualism and its role in society.
Another notable figure was Gertrud DELOOZE (1885-1968), a pioneering German educator who advocated for progressive teaching methods and the inclusion of outdoor activities in the curriculum.
Throughout history, the surname DELOOZE has been carried by individuals from various walks of life, from artists and academics to settlers and thinkers. While the name may have evolved in its spelling over time, its Dutch origins and potential connection to a free-spirited ancestor remain a part of its rich heritage.
Demographics
Ancestry and ethnicity for Delooze
Among Census respondents with the surname Delooze, the largest self-reported group is White at 94.9%. The next largest groups are American Indian/Alaska Native (2.6%) and Two or More Races (1.7%).
The bar chart below shows how Delooze 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 Delooze surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.9% · 111
- American Indian and Alaska Native2.6% · 3
- Two or more races1.7% · 2
- Hispanic or Latino0.9% · 1
Timeline
Historical Census data for Delooze
Delooze 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
#129,825
National surname rank
Recorded bearers 131
+1 bearers (+0.8%)
Per 100,000 0.04
Rank movement Down 7,291 places
2020
#144,270
National surname rank
Recorded bearers 117
-14 bearers (-10.7%)
Per 100,000 0.04
Rank movement Down 14,445 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #122,534 | 130 | 0.05 | First available Census row | First available Census row |
| 2010 | #129,825 | 131 | 0.04 | +1 bearers (+0.8%) | Down 7,291 places |
| 2020 | #144,270 | 117 | 0.04 | -14 bearers (-10.7%) | Down 14,445 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 Delooze 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 | #129,825 | #144,270 | -11.1% |
| Count | 131 | 117 | -10.7% |
| Per 100K | 0.04 | 0.04 | -2.1% |
Between the 2010 and 2020 Census, the number of Delooze bearers went from 131 to 117 (-10.7% change). The surname moved down 14,445 positions in the national ranking, going from #129,825 to #144,270.
FAQ
Delooze surname: questions and answers
How many people in the U.S. have the surname Delooze?
Name Census estimates that about 134 living Americans carry the surname Delooze. Using the current population baseline, that works out to roughly 1 in 2,557,868 residents.
How common is Delooze?
Delooze ranks #144,270 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 117 people with the surname Delooze. That is different from the site's living-bearer estimate (134), 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 Delooze.
Has Delooze become more or less common over time?
Between 2010 and 2020, the surname Delooze went from 131 recorded bearers to 117. That is a decrease of 14 (-10.7%). In the national ranking it fell from #129,825 to #144,270.
What does the Census say about the background of Delooze?
Among Census respondents with the surname Delooze, the largest self-reported group is White at 94.9%. The next largest groups are American Indian/Alaska Native (2.6%) and 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 Delooze in the 2020 Census, accounting for 94.9% (111 people in the source table).
What is the full ancestry breakdown?
Delooze appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.9%), American Indian/Alaska Native (2.6%), 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 Delooze (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 Delooze mean?
The name is derived from a diminutive form of a surname meaning "of Loos" or "from Loos." 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 Delooze (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 Delooze?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.