2010
#154,907
National surname rank
Recorded bearers 105
First available Census row
Per 100,000 0.04
Very Rare Last name
Cadaoas
An occupational surname from Spanish referring to one who cultivates or harvests rice.
According to the 2020 US Census Bureau surname tables, roughly 164 Americans carry the last name Cadaoas. That puts it at #125,732 in the national surname ranking, appearing at a frequency of 0.05 per 100,000 people (about 1 in 2,089,965 residents).
This page is the full Name Census profile for the Cadaoas 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
164
1 in 2,089,965
Census rank
#125,732
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
143
very rare in the US
Popularity narrative
The Census Bureau recorded 143 bearers of the surname Cadaoas in its 2020 decennial surname file. At a rate of 0.05 per 100,000 residents, it holds the 125732nd position in the national surname ranking.
Among Census respondents with the surname Cadaoas, the largest self-reported group is Asian/Pacific Islander at 67.8%. The next largest groups are Hispanic (19.6%) and Two or More Races (7.0%).
Origin
Meaning and origin of Cadaoas
The surname CADAOAS finds its origins in the ancient lands of Iberia, specifically the region that is now modern-day Portugal. It is believed to have emerged during the early medieval period, around the 9th or 10th century AD. The name is thought to be derived from the Galician-Portuguese word "cadavo," which referred to a type of ancient burial mound or cairn.
One of the earliest recorded mentions of the CADAOAS name can be found in a manuscript dating back to the 11th century, which documented land grants and property records in the northern Portuguese region of Entre-Douro-e-Minho. The name appears to have been associated with families residing in rural areas near these ancient burial sites.
In the 13th century, a nobleman named Afonso Cadaoas was recorded as a participant in the Reconquista, the ongoing conflict between Christian and Moorish forces on the Iberian Peninsula. He was known for his bravery and military prowess during the capture of the strategic city of Faro in the Algarve region.
The CADAOAS name also has ties to the town of Cadavos, located in the Portuguese district of Aveiro. It is believed that some families may have adopted the surname based on their association with this locality, whose name is derived from the same linguistic root.
During the Age of Exploration in the 15th and 16th centuries, several individuals bearing the CADAOAS surname played significant roles in the Portuguese voyages of discovery. One notable figure was João Cadaoas, a navigator who accompanied Vasco da Gama on his historic voyage to India in 1498.
Another individual of note was Inês Cadaoas, a poet and courtier who lived in the late 16th century. Her work, which celebrated the achievements of Portuguese explorers and the nation's maritime endeavors, earned her widespread acclaim during her lifetime.
As the centuries passed, the CADAOAS surname spread beyond Portugal's borders, with some families eventually settling in other parts of the Iberian Peninsula, as well as in the Portuguese colonies of Brazil and Africa. Despite its relatively rare occurrence, the name has persisted through the ages, serving as a testament to its rich historical roots.
Demographics
Ancestry and ethnicity for Cadaoas
Among Census respondents with the surname Cadaoas, the largest self-reported group is Asian/Pacific Islander at 67.8%. The next largest groups are Hispanic (19.6%) and Two or More Races (7.0%).
The bar chart below shows how Cadaoas 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 Cadaoas surname at the time of the 2020 Census, not any inherent property of the name itself.
- Asian and Pacific Islander67.8% · 97
- Hispanic or Latino19.6% · 28
- Two or more races7.0% · 10
- White5.6% · 8
Timeline
Historical Census data for Cadaoas
Cadaoas appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#125,732
National surname rank
Recorded bearers 143
+38 bearers (+36.2%)
Per 100,000 0.05
Rank movement Up 29,175 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #154,907 | 105 | 0.04 | First available Census row | First available Census row |
| 2020 | #125,732 | 143 | 0.05 | +38 bearers (+36.2%) | Up 29,175 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 Cadaoas 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 | #154,907 | #125,732 | 18.8% |
| Count | 105 | 143 | 36.2% |
| Per 100K | 0.04 | 0.05 | 19.6% |
Between the 2010 and 2020 Census, the number of Cadaoas bearers went from 105 to 143 (+36.2% change). The surname moved up 29,175 positions in the national ranking, going from #154,907 to #125,732.
FAQ
Cadaoas surname: questions and answers
How many people in the U.S. have the surname Cadaoas?
Name Census estimates that about 164 living Americans carry the surname Cadaoas. Using the current population baseline, that works out to roughly 1 in 2,089,965 residents.
How common is Cadaoas?
Cadaoas ranks #125,732 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.05 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 143 people with the surname Cadaoas. That is different from the site's living-bearer estimate (164), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.05 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.05 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 Cadaoas.
Has Cadaoas become more or less common over time?
Between 2010 and 2020, the surname Cadaoas went from 105 recorded bearers to 143. That is an increase of 38 (+36.2%). In the national ranking it rose from #154,907 to #125,732.
What does the Census say about the background of Cadaoas?
Among Census respondents with the surname Cadaoas, the largest self-reported group is Asian/Pacific Islander at 67.8%. The next largest groups are Hispanic (19.6%) and Two or More Races (7.0%). 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?
Asian/Pacific Islander is the largest self-reported group for the surname Cadaoas in the 2020 Census, accounting for 67.8% (97 people in the source table).
What is the full ancestry breakdown?
Cadaoas appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Asian/Pacific Islander (67.8%), Hispanic (19.6%), Two or More Races (7.0%). 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 Cadaoas (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 Cadaoas mean?
An occupational surname from Spanish referring to one who cultivates or harvests rice. 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 Cadaoas (0.05 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 surname Cadaoas?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.