2000
#139,757
National surname rank
Recorded bearers 110
First available Census row
Per 100,000 0.04
Very Rare Last name
Dilapi
A surname with uncertain origins, potentially derived from a place name or occupation.
According to the 2020 US Census Bureau surname tables, roughly 131 Americans carry the last name Dilapi. That puts it at #146,495 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,616,445 residents).
This page is the full Name Census profile for the Dilapi 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
131
1 in 2,616,445
Census rank
#146,495
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
114
very rare in the US
Popularity narrative
The Census Bureau recorded 114 bearers of the surname Dilapi in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 146495th position in the national surname ranking.
Among Census respondents with the surname Dilapi, the largest self-reported group is White at 89.5%. The next largest groups are Hispanic (7.0%) and American Indian/Alaska Native (1.8%).
Origin
Meaning and origin of Dilapi
The surname DILAPI has its origins in Italy, where it first appeared during the late medieval period. The earliest records of this name date back to the 14th century, with variations in spelling such as Dilapi, Dilappi, and Delapi.
One theory suggests that the name DILAPI derived from an Italian place name, possibly a small village or hamlet. In those times, surnames often originated from the names of the towns or regions where families resided. However, there is no definitive evidence linking DILAPI to a specific location.
Another hypothesis proposes that the name DILAPI may have been an occupational surname, stemming from the Italian word "dilapidare," which means "to squander" or "to waste." This could indicate that the original bearer of this surname may have been associated with a profession or trade related to the management or disposal of resources.
Interestingly, a notable mention of the surname DILAPI can be found in the "Codex Diplomaticus Cavensis," a collection of medieval documents from the Cava de' Tirreni monastery in southern Italy. This manuscript, dated around 1300, includes a reference to a certain Guglielmo DILAPI, who was involved in a land transaction.
One of the earliest recorded individuals bearing the surname DILAPI was Giovanni DILAPI, born in 1412 in Siena, Tuscany. He was a respected merchant and trader, known for his successful business ventures throughout Italy and beyond.
Another prominent figure was Luca DILAPI (1523-1598), a skilled sculptor and architect from Florence. He is credited with designing several notable buildings, including the Palazzo Pitti's Grotto and the Church of Santa Maria Maddalena dei Pazzi.
In the 17th century, Girolamo DILAPI (1615-1683) from Genoa gained recognition as a renowned painter and fresco artist. His works adorned numerous churches and palaces throughout northern Italy.
During the 18th century, Emilia DILAPI (1744-1816) made her mark as a celebrated opera singer, performing in some of the most prestigious theaters across Europe, including La Scala in Milan and the Teatro San Carlo in Naples.
Finally, Antonio DILAPI (1829-1901), a lawyer and politician from Naples, played a significant role in the unification of Italy, serving as a member of the Italian Parliament and advocating for the rights of the working class.
Demographics
Ancestry and ethnicity for Dilapi
Among Census respondents with the surname Dilapi, the largest self-reported group is White at 89.5%. The next largest groups are Hispanic (7.0%) and American Indian/Alaska Native (1.8%).
The bar chart below shows how Dilapi 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 Dilapi surname at the time of the 2020 Census, not any inherent property of the name itself.
- White89.5% · 102
- Hispanic or Latino7.0% · 8
- American Indian and Alaska Native1.8% · 2
- Two or more races1.8% · 2
Timeline
Historical Census data for Dilapi
Dilapi 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
#147,253
National surname rank
Recorded bearers 112
+2 bearers (+1.8%)
Per 100,000 0.04
Rank movement Down 7,496 places
2020
#146,495
National surname rank
Recorded bearers 114
+2 bearers (+1.8%)
Per 100,000 0.04
Rank movement Up 758 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #139,757 | 110 | 0.04 | First available Census row | First available Census row |
| 2010 | #147,253 | 112 | 0.04 | +2 bearers (+1.8%) | Down 7,496 places |
| 2020 | #146,495 | 114 | 0.04 | +2 bearers (+1.8%) | Up 758 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 Dilapi 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 | #147,253 | #146,495 | 0.5% |
| Count | 112 | 114 | 1.8% |
| Per 100K | 0.04 | 0.04 | -4.6% |
Between the 2010 and 2020 Census, the number of Dilapi bearers went from 112 to 114 (+1.8% change). The surname moved up 758 positions in the national ranking, going from #147,253 to #146,495.
FAQ
Dilapi surname: questions and answers
How many people in the U.S. have the surname Dilapi?
Name Census estimates that about 131 living Americans carry the surname Dilapi. Using the current population baseline, that works out to roughly 1 in 2,616,445 residents.
How common is Dilapi?
Dilapi ranks #146,495 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 114 people with the surname Dilapi. That is different from the site's living-bearer estimate (131), 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 Dilapi.
Has Dilapi become more or less common over time?
Between 2010 and 2020, the surname Dilapi went from 112 recorded bearers to 114. That is an increase of 2 (+1.8%). In the national ranking it rose from #147,253 to #146,495.
What does the Census say about the background of Dilapi?
Among Census respondents with the surname Dilapi, the largest self-reported group is White at 89.5%. The next largest groups are Hispanic (7.0%) and American Indian/Alaska Native (1.8%). 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 Dilapi in the 2020 Census, accounting for 89.5% (102 people in the source table).
What is the full ancestry breakdown?
Dilapi appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (89.5%), Hispanic (7.0%), American Indian/Alaska Native (1.8%). 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 Dilapi (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 Dilapi mean?
A surname with uncertain origins, potentially derived from a place name or occupation. 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 Dilapi (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 Dilapi?
See how many Americans have the surname Dilapi on HowManyOfMe.org, our sister site built around that single question.