2000
#111,119
National surname rank
Recorded bearers 147
First available Census row
Per 100,000 0.05
Very Rare Last name
Delappe
A French surname derived from the Old French "de la happe" meaning "from the hummock or hillock".
According to the 2020 US Census Bureau surname tables, roughly 136 Americans carry the last name Delappe. That puts it at #142,788 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,520,252 residents).
This page is the full Name Census profile for the Delappe 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
136
1 in 2,520,252
Census rank
#142,788
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
119
very rare in the US
Popularity narrative
The Census Bureau recorded 119 bearers of the surname Delappe in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 142788th position in the national surname ranking.
Among Census respondents with the surname Delappe, the largest self-reported group is White at 100.0%.
Origin
Meaning and origin of Delappe
The surname DELAPPE has its origins in France, originating in the Middle Ages. It is derived from the Old French words "de la" meaning "from the" and "appe," meaning "aspen tree." This suggests that the name likely referred to a person or family who lived near or owned land with aspen trees.
The earliest known record of the surname DELAPPE is found in the 13th century manuscript "Livre des Metiers" (Book of Trades) from Paris, which listed various professions and occupations. The name is spelled as "de la Ape" in this document, indicating that the modern spelling evolved over time.
One notable historical figure with the surname DELAPPE was Jean DELAPPE, a French soldier who fought in the Hundred Years' War against England. He was born around 1380 and served under the command of Joan of Arc during the Siege of Orleans in 1429.
In the 16th century, the DELAPPE family was prominent in the Normandy region of France. records show that a Pierre DELAPPE owned a estate in the village of Vire, and his son, Jacques DELAPPE, was a respected merchant in the nearby town of Caen.
The name DELAPPE also has a connection to the French town of Lappe, located in the Aquitaine region. It is believed that some members of the DELAPPE family may have originated from this area, as the name is sometimes spelled "de Lappe" in historical documents.
Another notable figure was Marie DELAPPE, a French painter who lived in the 17th century. Born in 1625 in Paris, she is known for her portraits of noble families and her religious paintings, which can be found in several churches throughout France.
In the 19th century, a prominent DELAPPE family resided in the region of Bordeaux, where they owned a successful winery. Louis DELAPPE, born in 1810, was a respected vintner and his wines were exported throughout Europe.
While the surname DELAPPE is not as common today as it once was, it remains a part of France's rich historical heritage, with its origins dating back to the Middle Ages and a connection to both noble families and commoners throughout the centuries.
Demographics
Ancestry and ethnicity for Delappe
Among Census respondents with the surname Delappe, the largest self-reported group is White at 100.0%.
The bar chart below shows how Delappe 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 Delappe surname at the time of the 2020 Census, not any inherent property of the name itself.
- White100.0% · 119
Timeline
Historical Census data for Delappe
Delappe 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
#130,610
National surname rank
Recorded bearers 130
-17 bearers (-11.6%)
Per 100,000 0.04
Rank movement Down 19,491 places
2020
#142,788
National surname rank
Recorded bearers 119
-11 bearers (-8.5%)
Per 100,000 0.04
Rank movement Down 12,178 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #111,119 | 147 | 0.05 | First available Census row | First available Census row |
| 2010 | #130,610 | 130 | 0.04 | -17 bearers (-11.6%) | Down 19,491 places |
| 2020 | #142,788 | 119 | 0.04 | -11 bearers (-8.5%) | Down 12,178 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 Delappe 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 | #130,610 | #142,788 | -9.3% |
| Count | 130 | 119 | -8.5% |
| Per 100K | 0.04 | 0.04 | -0.5% |
Between the 2010 and 2020 Census, the number of Delappe bearers went from 130 to 119 (-8.5% change). The surname moved down 12,178 positions in the national ranking, going from #130,610 to #142,788.
FAQ
Delappe surname: questions and answers
How many people in the U.S. have the surname Delappe?
Name Census estimates that about 136 living Americans carry the surname Delappe. Using the current population baseline, that works out to roughly 1 in 2,520,252 residents.
How common is Delappe?
Delappe ranks #142,788 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 119 people with the surname Delappe. That is different from the site's living-bearer estimate (136), 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 Delappe.
Has Delappe become more or less common over time?
Between 2010 and 2020, the surname Delappe went from 130 recorded bearers to 119. That is a decrease of 11 (-8.5%). In the national ranking it fell from #130,610 to #142,788.
What does the Census say about the background of Delappe?
Among Census respondents with the surname Delappe, the largest self-reported group is White at 100.0%. 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 Delappe in the 2020 Census, accounting for 100.0% (119 people in the source table).
What is the full ancestry breakdown?
Delappe appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (100.0%). 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 Delappe (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 Delappe mean?
A French surname derived from the Old French "de la happe" meaning "from the hummock or hillock". 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 Delappe (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 last name Delappe?
You can see how many people have the last name Delappe on our sister site HowManyOfMe.org — same data roots, lighter UI.