2000
#130,443
National surname rank
Recorded bearers 120
First available Census row
Per 100,000 0.04
Very Rare Last name
Deddo
An obsolete variant spelling of the surname "Deady" of uncertain origin.
According to the 2020 US Census Bureau surname tables, roughly 135 Americans carry the last name Deddo. That puts it at #143,511 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,538,921 residents).
This page is the full Name Census profile for the Deddo 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
135
1 in 2,538,921
Census rank
#143,511
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
118
very rare in the US
Popularity narrative
The Census Bureau recorded 118 bearers of the surname Deddo in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 143511th position in the national surname ranking.
Among Census respondents with the surname Deddo, the largest self-reported group is White at 89.0%. The next largest groups are Two or More Races (5.9%) and Hispanic (4.2%).
Origin
Meaning and origin of Deddo
The surname DEDDO is of Italian origin, first appearing in records from the late 13th century. It is believed to have originated in the regions of Tuscany and Emilia-Romagna, possibly derived from the Italian word "deddo," meaning "gift" or "present." This suggests that the name may have been given to someone who received a gift or perhaps a child born on a special occasion.
One of the earliest recorded instances of the name DEDDO can be found in a document from the town of Modena, dated 1287. This document mentions a certain "Giovanni Deddo," who was a local merchant. In the 14th century, the name also appears in the records of the city of Florence, with references to a family of artisans bearing the surname.
During the Renaissance period, the DEDDO name gained some prominence in the arts. Notably, a painter named Giulio DEDDO (1510-1592) was active in Bologna and is known for his religious works and frescoes adorning several churches in the region. Another notable bearer of the name was Tommaso DEDDO (1580-1644), a renowned sculptor from Florence whose works can still be admired in various churches and museums across Italy.
In the 17th century, the DEDDO family expanded beyond the borders of Italy. Records show that a branch of the family settled in the city of Marseille, France, where they became involved in the maritime trade. One of the most prominent members of this French branch was Jacques DEDDO (1632-1701), a successful merchant and ship owner.
The 19th century saw the DEDDO name spread further across Europe and even to the Americas. A notable figure was Antonio DEDDO (1815-1890), an Italian-born engineer who played a significant role in the construction of several railways in Argentina and Brazil.
Other notable bearers of the DEDDO surname include:
1. Francesco DEDDO (1743-1821), an Italian politician and diplomat who served as an ambassador for the Kingdom of Sardinia.
2. Luciano DEDDO (1901-1976), an Italian sculptor known for his works in bronze and marble, many of which can be found in public spaces throughout Italy.
3. Maria DEDDO (1923-2008), a renowned Italian opera singer who performed at venues such as La Scala and the Metropolitan Opera.
4. Enrico DEDDO (1942-2018), an Italian author and journalist who wrote extensively on the history and culture of his native Tuscany.
5. Alessandra DEDDO (born 1972), an Italian contemporary artist known for her mixed-media installations and sculptures.
Demographics
Ancestry and ethnicity for Deddo
Among Census respondents with the surname Deddo, the largest self-reported group is White at 89.0%. The next largest groups are Two or More Races (5.9%) and Hispanic (4.2%).
The bar chart below shows how Deddo 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 Deddo surname at the time of the 2020 Census, not any inherent property of the name itself.
- White89.0% · 105
- Two or more races5.9% · 7
- Hispanic or Latino4.2% · 5
- American Indian and Alaska Native0.8% · 1
Timeline
Historical Census data for Deddo
Deddo 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
#150,452
National surname rank
Recorded bearers 109
-11 bearers (-9.2%)
Per 100,000 0.04
Rank movement Down 20,009 places
2020
#143,511
National surname rank
Recorded bearers 118
+9 bearers (+8.3%)
Per 100,000 0.04
Rank movement Up 6,941 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #130,443 | 120 | 0.04 | First available Census row | First available Census row |
| 2010 | #150,452 | 109 | 0.04 | -11 bearers (-9.2%) | Down 20,009 places |
| 2020 | #143,511 | 118 | 0.04 | +9 bearers (+8.3%) | Up 6,941 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 Deddo 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 | #150,452 | #143,511 | 4.6% |
| Count | 109 | 118 | 8.3% |
| Per 100K | 0.04 | 0.04 | -1.3% |
Between the 2010 and 2020 Census, the number of Deddo bearers went from 109 to 118 (+8.3% change). The surname moved up 6,941 positions in the national ranking, going from #150,452 to #143,511.
FAQ
Deddo surname: questions and answers
How many people in the U.S. have the surname Deddo?
Name Census estimates that about 135 living Americans carry the surname Deddo. Using the current population baseline, that works out to roughly 1 in 2,538,921 residents.
How common is Deddo?
Deddo ranks #143,511 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 118 people with the surname Deddo. That is different from the site's living-bearer estimate (135), 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 Deddo.
Has Deddo become more or less common over time?
Between 2010 and 2020, the surname Deddo went from 109 recorded bearers to 118. That is an increase of 9 (+8.3%). In the national ranking it rose from #150,452 to #143,511.
What does the Census say about the background of Deddo?
Among Census respondents with the surname Deddo, the largest self-reported group is White at 89.0%. The next largest groups are Two or More Races (5.9%) and Hispanic (4.2%). 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 Deddo in the 2020 Census, accounting for 89.0% (105 people in the source table).
What is the full ancestry breakdown?
Deddo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (89.0%), Two or More Races (5.9%), Hispanic (4.2%). 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 Deddo (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 Deddo mean?
An obsolete variant spelling of the surname "Deady" of uncertain origin. 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 Deddo (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 share the surname Deddo?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.