2000
#135,837
National surname rank
Recorded bearers 114
First available Census row
Per 100,000 0.04
Very Rare Last name
Janesky
A surname derived from the given name "Jan" or "John", possibly indicating Russian or Slavic origins.
According to the 2020 US Census Bureau surname tables, roughly 115 Americans carry the last name Janesky. That puts it at #155,682 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,980,473 residents).
This page is the full Name Census profile for the Janesky 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
115
1 in 2,980,473
Census rank
#155,682
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
100
very rare in the US
Popularity narrative
The Census Bureau recorded 100 bearers of the surname Janesky in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155682nd position in the national surname ranking.
Among Census respondents with the surname Janesky, the largest self-reported group is White at 93.0%. The next largest groups are Hispanic (5.0%) and Black (1.0%).
Origin
Meaning and origin of Janesky
The surname Janesky originated from the Czech Republic, a country located in Central Europe. It is believed to have emerged around the 13th century, during the reign of the Premyslid dynasty. The name is derived from the Slavic root "Jan," which is a variation of the name John or Johannes.
One of the earliest recorded instances of the Janesky surname can be found in the Bohemian land records from the late 14th century. These records document the presence of a family bearing this name in the region of Moravia, which was part of the Kingdom of Bohemia at the time.
The name Janesky is thought to have originated as a patronymic surname, meaning it was initially used to identify individuals as the sons or descendants of a man named Jan or Janesk. This naming convention was common in medieval Europe, particularly among Slavic populations.
In the 16th century, a notable figure named Jiri Janesky (1528-1594) was a prominent Czech theologian and writer who played a significant role in the Protestant Reformation in Bohemia. His works, including translations of the Bible into Czech, had a lasting impact on the religious and cultural landscape of the region.
Another historical figure with the Janesky surname was Jan Janesky (1670-1721), a Czech composer and organist who lived during the Baroque period. His compositions, particularly his organ works, were widely performed and admired in his time.
During the 19th century, the Janesky name appeared in various records and documents from the Austro-Hungarian Empire, which included parts of modern-day Czech Republic, Slovakia, and Austria. One such example is Frantisek Janesky (1828-1891), a Czech politician and journalist who advocated for Czech national rights and independence from Austrian rule.
In the early 20th century, a notable figure named Jaroslav Janesky (1892-1967) gained recognition as a Czech painter and graphic artist. His works, which often depicted scenes of everyday life and landscapes, were influenced by the Art Nouveau and Cubist movements.
Throughout its history, the Janesky surname has been subject to various spelling variations, including Janecky, Janetzky, and Janetzki, reflecting regional dialects and linguistic differences within the Czech lands.
Demographics
Ancestry and ethnicity for Janesky
Among Census respondents with the surname Janesky, the largest self-reported group is White at 93.0%. The next largest groups are Hispanic (5.0%) and Black (1.0%).
The bar chart below shows how Janesky 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 Janesky surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.0% · 93
- Hispanic or Latino5.0% · 5
- Black or African American1.0% · 1
- American Indian and Alaska Native1.0% · 1
Timeline
Historical Census data for Janesky
Janesky 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
#151,532
National surname rank
Recorded bearers 108
-6 bearers (-5.3%)
Per 100,000 0.04
Rank movement Down 15,695 places
2020
#155,682
National surname rank
Recorded bearers 100
-8 bearers (-7.4%)
Per 100,000 0.03
Rank movement Down 4,150 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #135,837 | 114 | 0.04 | First available Census row | First available Census row |
| 2010 | #151,532 | 108 | 0.04 | -6 bearers (-5.3%) | Down 15,695 places |
| 2020 | #155,682 | 100 | 0.03 | -8 bearers (-7.4%) | Down 4,150 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 Janesky 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 | #151,532 | #155,682 | -2.7% |
| Count | 108 | 100 | -7.4% |
| Per 100K | 0.04 | 0.03 | -16.4% |
Between the 2010 and 2020 Census, the number of Janesky bearers went from 108 to 100 (-7.4% change). The surname moved down 4,150 positions in the national ranking, going from #151,532 to #155,682.
FAQ
Janesky surname: questions and answers
How many people in the U.S. have the surname Janesky?
Name Census estimates that about 115 living Americans carry the surname Janesky. Using the current population baseline, that works out to roughly 1 in 2,980,473 residents.
How common is Janesky?
Janesky ranks #155,682 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 100 people with the surname Janesky. That is different from the site's living-bearer estimate (115), 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 Janesky.
Has Janesky become more or less common over time?
Between 2010 and 2020, the surname Janesky went from 108 recorded bearers to 100. That is a decrease of 8 (-7.4%). In the national ranking it fell from #151,532 to #155,682.
What does the Census say about the background of Janesky?
Among Census respondents with the surname Janesky, the largest self-reported group is White at 93.0%. The next largest groups are Hispanic (5.0%) and Black (1.0%). 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?
White is the largest self-reported group for the surname Janesky in the 2020 Census, accounting for 93.0% (93 people in the source table).
What is the full ancestry breakdown?
Janesky appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.0%), Hispanic (5.0%), Black (1.0%). 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 Janesky (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 Janesky mean?
A surname derived from the given name "Jan" or "John", possibly indicating Russian or Slavic origins. 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 Janesky (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 have the last name Janesky?
If you just want to know how many Americans have the surname Janesky, HowManyOfMe.org gives you the headline number in one glance.