2010
#147,253
National surname rank
Recorded bearers 112
First available Census row
Per 100,000 0.04
Very Rare Last name
Janini
A surname derived from the French Janin, a diminutive form of Jean or John.
According to the 2020 US Census Bureau surname tables, roughly 124 Americans carry the last name Janini. 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 Janini 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 Janini 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 Janini, the largest self-reported group is White at 74.1%. The next largest groups are Hispanic (20.4%) and Black (2.8%).
Origin
Meaning and origin of Janini
The surname JANINI originated in Italy during the late medieval period, primarily in the regions of Tuscany and Emilia-Romagna. It is believed to be derived from the Latin personal name "Januarius," meaning "of January" or "born in January." The name Januarius was quite common in ancient Rome and was often bestowed upon children born during that month.
The earliest recorded instances of the JANINI surname can be traced back to the 13th century in various Italian municipal records and tax rolls. One notable example is the appearance of a "Gherardo Janini" in the Florentine records of 1287. This suggests that the surname had already been established in the region by that time.
During the Renaissance period, several notable individuals bore the JANINI surname. One of the most prominent was Francesco Janini (1502-1570), a renowned Florentine architect and sculptor who contributed to the design of several churches and palaces in Florence and its surrounding areas.
Another historical figure of note was Bartolomeo Janini (1578-1652), a Bolognese scholar and theologian who authored several treatises on religious doctrine and served as a professor at the University of Bologna for many years.
In the 17th century, the JANINI surname can be found in various records from the Papal States, particularly in the regions of Umbria and Marche. One such example is Giovanni Battista Janini (1615-1689), a priest and historian from Perugia who wrote extensively on the history of his hometown.
Moving into the 18th century, the JANINI family had spread to other parts of Italy, including the island of Sardinia. One notable figure from this period was Antonio Janini (1732-1803), a lawyer and politician from Cagliari who served as a magistrate and played a significant role in the island's legal and administrative affairs.
Throughout the 19th century, the JANINI surname continued to be present in various regions of Italy, with several individuals making contributions in fields such as literature, medicine, and the arts. One notable example was Giuseppe Janini (1819-1892), a Neapolitan writer and journalist who published several novels and short stories reflecting the cultural and social life of his time.
While the JANINI surname has a rich history in Italy, it is important to note that surnames can often be found in multiple countries due to migration patterns and cultural exchanges over the centuries. However, the Italian origins and early records remain a significant part of the surname's heritage.
Demographics
Ancestry and ethnicity for Janini
Among Census respondents with the surname Janini, the largest self-reported group is White at 74.1%. The next largest groups are Hispanic (20.4%) and Black (2.8%).
The bar chart below shows how Janini 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 Janini surname at the time of the 2020 Census, not any inherent property of the name itself.
- White74.1% · 80
- Hispanic or Latino20.4% · 22
- Black or African American2.8% · 3
- Two or more races2.8% · 3
Timeline
Historical Census data for Janini
Janini 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
#150,935
National surname rank
Recorded bearers 108
-4 bearers (-3.6%)
Per 100,000 0.04
Rank movement Down 3,682 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #147,253 | 112 | 0.04 | First available Census row | First available Census row |
| 2020 | #150,935 | 108 | 0.04 | -4 bearers (-3.6%) | Down 3,682 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 Janini 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 | #147,253 | #150,935 | -2.5% |
| Count | 112 | 108 | -3.6% |
| Per 100K | 0.04 | 0.04 | -9.7% |
Between the 2010 and 2020 Census, the number of Janini bearers went from 112 to 108 (-3.6% change). The surname moved down 3,682 positions in the national ranking, going from #147,253 to #150,935.
FAQ
Janini surname: questions and answers
How many people in the U.S. have the surname Janini?
Name Census estimates that about 124 living Americans carry the surname Janini. Using the current population baseline, that works out to roughly 1 in 2,764,148 residents.
How common is Janini?
Janini 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 Janini. 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 Janini.
Has Janini become more or less common over time?
Between 2010 and 2020, the surname Janini went from 112 recorded bearers to 108. That is a decrease of 4 (-3.6%). In the national ranking it fell from #147,253 to #150,935.
What does the Census say about the background of Janini?
Among Census respondents with the surname Janini, the largest self-reported group is White at 74.1%. The next largest groups are Hispanic (20.4%) and Black (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 Janini in the 2020 Census, accounting for 74.1% (80 people in the source table).
What is the full ancestry breakdown?
Janini appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (74.1%), Hispanic (20.4%), Black (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 Janini (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 Janini mean?
A surname derived from the French Janin, a diminutive form of Jean or John. 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 Janini (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 have the last name Janini?
Find out how many Americans have the surname Janini on our sister site HowManyOfMe.org — a quick modern estimate with the living-bearer count front and centre.