2000
#126,400
National surname rank
Recorded bearers 125
First available Census row
Per 100,000 0.05
Very Rare Last name
Jerro
A surname originating from Spanish or Italian indicating someone from a specific place or region.
According to the 2020 US Census Bureau surname tables, roughly 119 Americans carry the last name Jerro. That puts it at #153,590 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,880,289 residents).
This page is the full Name Census profile for the Jerro 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
119
1 in 2,880,289
Census rank
#153,590
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
104
very rare in the US
Popularity narrative
The Census Bureau recorded 104 bearers of the surname Jerro in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 153590th position in the national surname ranking.
Among Census respondents with the surname Jerro, the largest self-reported group is Black at 48.1%. The next largest groups are White (40.4%) and Hispanic (11.5%).
Origin
Meaning and origin of Jerro
The surname JERRO has its origins in Italy, tracing back to the late 15th century. Specifically, it emerged in the northern regions of the country, particularly in the areas around Genoa and Piacenza. The name is believed to derive from the Italian word "gerra," which means "war" or "conflict," suggesting a potential link to military service or involvement in battles.
One of the earliest recorded instances of the surname JERRO appears in a document from the Archivio di Stato di Genova, dated 1487, where a certain Giovanni Jerro is mentioned as a merchant engaged in trade with the Republic of Venice. This suggests that the name was already established in the region at that time.
Another notable historical reference can be found in the records of the Duchy of Piacenza, where a family by the name of Jerro is mentioned as landowners in the early 16th century. The records detail their holdings in the village of Gossolengo, near Piacenza.
In the 17th century, a prominent figure bearing the surname JERRO was Giacomo Jerro (1612-1678), a renowned painter from Genoa who specialized in religious and historical scenes. His works can be found in various churches and galleries across Italy.
Moving into the 18th century, the name JERRO gained recognition through the exploits of Domenico Jerro (1732-1801), a Genoese naval captain who played a significant role in the naval battles against the French during the Revolutionary Wars. His bravery and leadership were celebrated in several contemporary accounts.
In the 19th century, a notable figure was Giuseppe Jerro (1825-1893), a lawyer and politician from Piacenza who served as a member of the Italian Parliament and was known for his advocacy of workers' rights and social reforms.
Another individual worth mentioning is Maria Jerro (1876-1944), a writer and educator from Genoa who published several works on Italian literature and culture. Her contributions to the preservation of local traditions and folklore were widely recognized.
Throughout the centuries, the surname JERRO has also been associated with various place names and older spellings, such as Jerri, Gierro, and Ghierro, reflecting the regional variations and linguistic influences across different parts of Italy.
Demographics
Ancestry and ethnicity for Jerro
Among Census respondents with the surname Jerro, the largest self-reported group is Black at 48.1%. The next largest groups are White (40.4%) and Hispanic (11.5%).
The bar chart below shows how Jerro 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 Jerro surname at the time of the 2020 Census, not any inherent property of the name itself.
- Black or African American48.1% · 50
- White40.4% · 42
- Hispanic or Latino11.5% · 12
Timeline
Historical Census data for Jerro
Jerro 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 (-2.4%)
Per 100,000 0.04
Rank movement Down 10,927 places
2020
#153,590
National surname rank
Recorded bearers 104
-18 bearers (-14.8%)
Per 100,000 0.03
Rank movement Down 16,263 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #126,400 | 125 | 0.05 | First available Census row | First available Census row |
| 2010 | #137,327 | 122 | 0.04 | -3 bearers (-2.4%) | Down 10,927 places |
| 2020 | #153,590 | 104 | 0.03 | -18 bearers (-14.8%) | Down 16,263 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 Jerro 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 | #153,590 | -11.8% |
| Count | 122 | 104 | -14.8% |
| Per 100K | 0.04 | 0.03 | -13.0% |
Between the 2010 and 2020 Census, the number of Jerro bearers went from 122 to 104 (-14.8% change). The surname moved down 16,263 positions in the national ranking, going from #137,327 to #153,590.
FAQ
Jerro surname: questions and answers
How many people in the U.S. have the surname Jerro?
Name Census estimates that about 119 living Americans carry the surname Jerro. Using the current population baseline, that works out to roughly 1 in 2,880,289 residents.
How common is Jerro?
Jerro ranks #153,590 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 104 people with the surname Jerro. That is different from the site's living-bearer estimate (119), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Jerro.
Has Jerro become more or less common over time?
Between 2010 and 2020, the surname Jerro went from 122 recorded bearers to 104. That is a decrease of 18 (-14.8%). In the national ranking it fell from #137,327 to #153,590.
What does the Census say about the background of Jerro?
Among Census respondents with the surname Jerro, the largest self-reported group is Black at 48.1%. The next largest groups are White (40.4%) and Hispanic (11.5%). 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?
Black is the largest self-reported group for the surname Jerro in the 2020 Census, accounting for 48.1% (50 people in the source table).
What is the full ancestry breakdown?
Jerro appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Black (48.1%), White (40.4%), Hispanic (11.5%). 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 Jerro (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 Jerro mean?
A surname originating from Spanish or Italian indicating someone from a specific place or region. 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 Jerro (0.03 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 Jerro?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.