2000
#102,173
National surname rank
Recorded bearers 163
First available Census row
Per 100,000 0.06
Very Rare Last name
Marero
Of Spanish origin, possibly referring to someone from or associated with the sea or maritime occupations.
According to the 2020 US Census Bureau surname tables, roughly 133 Americans carry the last name Marero. That puts it at #145,028 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,577,100 residents).
This page is the full Name Census profile for the Marero 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
133
1 in 2,577,100
Census rank
#145,028
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
116
very rare in the US
Popularity narrative
The Census Bureau recorded 116 bearers of the surname Marero in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 145028th position in the national surname ranking.
Among Census respondents with the surname Marero, the largest self-reported group is Hispanic at 81.9%. The next largest groups are Asian/Pacific Islander (11.2%) and White (3.4%).
Origin
Meaning and origin of Marero
The surname "MARERO" is believed to have originated in Italy during the late 15th century. It is thought to be derived from the Italian word "marere," which means "to be amazed or astonished." This suggests that the name may have been initially given as a nickname to someone who was easily amazed or had a tendency to be awestruck.
One of the earliest recorded instances of the surname "MARERO" can be found in a document from the city of Venice, dated 1487. In this document, a merchant named Giovanni Marero is mentioned as having traded goods with merchants from the Byzantine Empire.
During the 16th century, the name "MARERO" began to spread throughout various regions of Italy. In the northern city of Genoa, there are records of a family by the name of Marero who were prominent silk traders. One notable member of this family was Alessandro Marero (1521-1598), who is credited with introducing new techniques for silk dyeing that became widely adopted throughout Europe.
In the 17th century, the name "MARERO" appeared in several manuscripts from the Papal States. One particularly interesting reference is found in a manuscript from the Vatican Library, which mentions a monk named Benedetto Marero (1612-1679) who was known for his exceptional calligraphy skills.
As the centuries passed, the surname "MARERO" continued to be prevalent in various parts of Italy. In the late 18th century, a painter named Vincenzo Marero (1756-1824) from Naples gained recognition for his landscape paintings, which depicted the beautiful countryside of southern Italy.
Another notable individual with the surname "MARERO" was Giuseppe Marero (1825-1892), a military officer who fought in the Italian unification wars of the 19th century. He was awarded several medals for his bravery and leadership during the battles against the Austrian Empire.
Throughout its history, the surname "MARERO" has maintained a strong presence in Italy, although it has also been found in other parts of Europe and the world due to migration and diaspora. While the name's origins can be traced back to the late medieval period, its meaning and significance have endured, reflecting the rich cultural heritage of the Italian people.
Demographics
Ancestry and ethnicity for Marero
Among Census respondents with the surname Marero, the largest self-reported group is Hispanic at 81.9%. The next largest groups are Asian/Pacific Islander (11.2%) and White (3.4%).
The bar chart below shows how Marero 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 Marero surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino81.9% · 95
- Asian and Pacific Islander11.2% · 13
- White3.4% · 4
- Black or African American2.6% · 3
- Two or more races0.9% · 1
Timeline
Historical Census data for Marero
Marero 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
#129,825
National surname rank
Recorded bearers 131
-32 bearers (-19.6%)
Per 100,000 0.04
Rank movement Down 27,652 places
2020
#145,028
National surname rank
Recorded bearers 116
-15 bearers (-11.5%)
Per 100,000 0.04
Rank movement Down 15,203 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #102,173 | 163 | 0.06 | First available Census row | First available Census row |
| 2010 | #129,825 | 131 | 0.04 | -32 bearers (-19.6%) | Down 27,652 places |
| 2020 | #145,028 | 116 | 0.04 | -15 bearers (-11.5%) | Down 15,203 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 Marero 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 | #129,825 | #145,028 | -11.7% |
| Count | 131 | 116 | -11.5% |
| Per 100K | 0.04 | 0.04 | -3.0% |
Between the 2010 and 2020 Census, the number of Marero bearers went from 131 to 116 (-11.5% change). The surname moved down 15,203 positions in the national ranking, going from #129,825 to #145,028.
FAQ
Marero surname: questions and answers
How many people in the U.S. have the surname Marero?
Name Census estimates that about 133 living Americans carry the surname Marero. Using the current population baseline, that works out to roughly 1 in 2,577,100 residents.
How common is Marero?
Marero ranks #145,028 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 116 people with the surname Marero. That is different from the site's living-bearer estimate (133), 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 Marero.
Has Marero become more or less common over time?
Between 2010 and 2020, the surname Marero went from 131 recorded bearers to 116. That is a decrease of 15 (-11.5%). In the national ranking it fell from #129,825 to #145,028.
What does the Census say about the background of Marero?
Among Census respondents with the surname Marero, the largest self-reported group is Hispanic at 81.9%. The next largest groups are Asian/Pacific Islander (11.2%) and White (3.4%). 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?
Hispanic is the largest self-reported group for the surname Marero in the 2020 Census, accounting for 81.9% (95 people in the source table).
What is the full ancestry breakdown?
Marero appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (81.9%), Asian/Pacific Islander (11.2%), White (3.4%). 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 Marero (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 Marero mean?
Of Spanish origin, possibly referring to someone from or associated with the sea or maritime occupations. 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 Marero (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 Americans have the surname Marero?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.