2000
#131,366
National surname rank
Recorded bearers 119
First available Census row
Per 100,000 0.04
Very Rare Last name
Didiego
A surname derived from the Spanish given name Diego, meaning disciple or follower.
According to the 2020 US Census Bureau surname tables, roughly 124 Americans carry the last name Didiego. That puts it at #150,935 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,764,148 residents).
This page is the full Name Census profile for the Didiego 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
124
1 in 2,764,148
Census rank
#150,935
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
108
very rare in the US
Popularity narrative
The Census Bureau recorded 108 bearers of the surname Didiego in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 150935th position in the national surname ranking.
Among Census respondents with the surname Didiego, the largest self-reported group is White at 68.5%. The next largest groups are Hispanic (27.8%) and Two or More Races (2.8%).
Origin
Meaning and origin of Didiego
The surname DIDIEGO finds its origins in the Italian region of Tuscany, with records dating back to the 13th century. It is believed to have derived from the Italian phrase "di diego," meaning "of Diego," suggesting that the name may have been initially used to identify individuals who were associated with or related to someone named Diego.
Early references to the DIDIEGO surname can be found in various historical documents from Tuscany, including municipal records and church registries. One notable mention is in the archives of the city of Siena, where a certain Giovanni DIDIEGO is recorded as a landowner in the year 1287.
As the surname spread beyond its original region, it underwent slight variations in spelling, such as DiDiego, Di Diego, and De Diegho. These variations were often influenced by local dialects and scribal practices at the time.
One of the earliest recorded individuals bearing the DIDIEGO surname was Matteo DIDIEGO, a prominent merchant from Florence who lived in the late 14th century. His business dealings and travels are documented in several letters and trade records from the period.
In the 15th century, the DIDIEGO name appeared in the Florentine Catasto, a census-like tax record that provided valuable insight into the city's population and socioeconomic structure. The 1427 Catasto lists a family headed by Piero DIDIEGO, who owned a vineyard in the outskirts of Florence.
Another notable figure was Francesco DIDIEGO, a renowned architect from Siena who lived in the 16th century. He is credited with the design and construction of several iconic buildings in his hometown, including the Chiesa di San Sebastiano and the Palazzo Petrucci.
During the Renaissance period, the DIDIEGO surname was also associated with the arts. One example is Girolamo DIDIEGO, a painter from Pisa who was active in the early 17th century. His works can be found in various churches and galleries throughout Italy.
In the 19th century, Giuseppe DIDIEGO made a name for himself as a prominent Italian politician and statesman. Born in Naples in 1810, he played a significant role in the unification of Italy and served as a member of the first Italian parliament after the country's unification in 1861.
These are just a few examples of individuals who have carried the DIDIEGO surname throughout history, reflecting its rich heritage and long-standing presence in various regions of Italy.
Demographics
Ancestry and ethnicity for Didiego
Among Census respondents with the surname Didiego, the largest self-reported group is White at 68.5%. The next largest groups are Hispanic (27.8%) and Two or More Races (2.8%).
The bar chart below shows how Didiego 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 Didiego surname at the time of the 2020 Census, not any inherent property of the name itself.
- White68.5% · 74
- Hispanic or Latino27.8% · 30
- Two or more races2.8% · 3
- Asian and Pacific Islander0.9% · 1
Timeline
Historical Census data for Didiego
Didiego 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
#137,327
National surname rank
Recorded bearers 122
+3 bearers (+2.5%)
Per 100,000 0.04
Rank movement Down 5,961 places
2020
#150,935
National surname rank
Recorded bearers 108
-14 bearers (-11.5%)
Per 100,000 0.04
Rank movement Down 13,608 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #131,366 | 119 | 0.04 | First available Census row | First available Census row |
| 2010 | #137,327 | 122 | 0.04 | +3 bearers (+2.5%) | Down 5,961 places |
| 2020 | #150,935 | 108 | 0.04 | -14 bearers (-11.5%) | Down 13,608 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 Didiego 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 | #137,327 | #150,935 | -9.9% |
| Count | 122 | 108 | -11.5% |
| Per 100K | 0.04 | 0.04 | -9.7% |
Between the 2010 and 2020 Census, the number of Didiego bearers went from 122 to 108 (-11.5% change). The surname moved down 13,608 positions in the national ranking, going from #137,327 to #150,935.
FAQ
Didiego surname: questions and answers
How many people in the U.S. have the surname Didiego?
Name Census estimates that about 124 living Americans carry the surname Didiego. Using the current population baseline, that works out to roughly 1 in 2,764,148 residents.
How common is Didiego?
Didiego ranks #150,935 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 108 people with the surname Didiego. That is different from the site's living-bearer estimate (124), 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 Didiego.
Has Didiego become more or less common over time?
Between 2010 and 2020, the surname Didiego went from 122 recorded bearers to 108. That is a decrease of 14 (-11.5%). In the national ranking it fell from #137,327 to #150,935.
What does the Census say about the background of Didiego?
Among Census respondents with the surname Didiego, the largest self-reported group is White at 68.5%. The next largest groups are Hispanic (27.8%) and Two or More Races (2.8%). 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 Didiego in the 2020 Census, accounting for 68.5% (74 people in the source table).
What is the full ancestry breakdown?
Didiego appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (68.5%), Hispanic (27.8%), Two or More Races (2.8%). 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 Didiego (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 Didiego mean?
A surname derived from the Spanish given name Diego, meaning disciple or follower. 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 Didiego (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 common is the surname Didiego?
You can see how many people have the surname Didiego on our sister site HowManyOfMe.org — same data roots, lighter UI.