2010
#144,141
National surname rank
Recorded bearers 115
First available Census row
Per 100,000 0.04
Very Rare Last name
Janiszeski
Polish surname derived from the personal name "Jan", meaning "God is gracious".
According to the 2020 US Census Bureau surname tables, roughly 127 Americans carry the last name Janiszeski. That puts it at #148,665 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,698,853 residents).
This page is the full Name Census profile for the Janiszeski 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
127
1 in 2,698,853
Census rank
#148,665
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
111
very rare in the US
Popularity narrative
The Census Bureau recorded 111 bearers of the surname Janiszeski in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 148665th position in the national surname ranking.
Among Census respondents with the surname Janiszeski, the largest self-reported group is White at 94.6%. The next largest groups are Black (1.8%) and Hispanic (1.8%).
Origin
Meaning and origin of Janiszeski
The surname Janiszeski is of Polish origin, first appearing in the historical records of the late 15th century. It is believed to have originated from the Polish village of Janiszew, located in the Mazovian region of central Poland. The name is derived from the Slavic word "jan," meaning "John," and the possessive suffix "-ski," indicating a link to a place or person.
One of the earliest recorded instances of the name can be found in the parish records of the village of Janiszew, where a certain Stanislaw Janiszeski was listed as a landowner in the year 1498. The Janiszeski family played a prominent role in the local community, with several members serving as village elders and representatives in regional assemblies.
In the 16th century, the name began to spread beyond the borders of Janiszew, as members of the Janiszeski family sought new opportunities in neighboring towns and cities. Notable individuals from this era include Michal Janiszeski (1523-1587), a respected scholar and theologian who taught at the University of Krakow, and Jadwiga Janiszeski (1547-1612), a renowned herbalist and healer.
During the 17th and 18th centuries, the Janiszeski name appeared in various historical documents throughout the Polish-Lithuanian Commonwealth. Jan Janiszeski (1672-1737) was a skilled architect who contributed to the design of several churches and monasteries in the region. Another notable figure was Zofia Janiszeski (1701-1785), a celebrated poet and playwright whose works explored themes of love, loss, and the human condition.
As Poland experienced periods of occupation and upheaval in the 19th century, many Janiszeski families sought refuge and new beginnings in other parts of Europe and the Americas. One such individual was Tomasz Janiszeski (1822-1897), a military officer who fought valiantly in the November Uprising against Russian rule. He later immigrated to the United States and settled in Chicago, where he became a respected member of the Polish-American community.
Throughout the 20th century, the Janiszeski name continued to be carried by individuals of notable achievement. Wladyslaw Janiszeski (1904-1988) was a renowned linguist and author who made significant contributions to the study of Slavic languages. Maria Janiszeski (1927-2018) was a celebrated artist and sculptor, whose works were exhibited in galleries across Europe and North America.
While the Janiszeski surname may have originated from a small village in central Poland, its legacy has been woven into the rich tapestry of Polish history and culture, spanning centuries and crossing continents. The name continues to be a source of pride and identity for those who carry it, serving as a testament to the enduring spirit and resilience of the Polish people.
Demographics
Ancestry and ethnicity for Janiszeski
Among Census respondents with the surname Janiszeski, the largest self-reported group is White at 94.6%. The next largest groups are Black (1.8%) and Hispanic (1.8%).
The bar chart below shows how Janiszeski 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 Janiszeski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.6% · 105
- Black or African American1.8% · 2
- Hispanic or Latino1.8% · 2
- American Indian and Alaska Native0.9% · 1
- Two or more races0.9% · 1
Timeline
Historical Census data for Janiszeski
Janiszeski 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
#148,665
National surname rank
Recorded bearers 111
-4 bearers (-3.5%)
Per 100,000 0.04
Rank movement Down 4,524 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #144,141 | 115 | 0.04 | First available Census row | First available Census row |
| 2020 | #148,665 | 111 | 0.04 | -4 bearers (-3.5%) | Down 4,524 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 Janiszeski 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 | #144,141 | #148,665 | -3.1% |
| Count | 115 | 111 | -3.5% |
| Per 100K | 0.04 | 0.04 | -7.2% |
Between the 2010 and 2020 Census, the number of Janiszeski bearers went from 115 to 111 (-3.5% change). The surname moved down 4,524 positions in the national ranking, going from #144,141 to #148,665.
FAQ
Janiszeski surname: questions and answers
How many people in the U.S. have the surname Janiszeski?
Name Census estimates that about 127 living Americans carry the surname Janiszeski. Using the current population baseline, that works out to roughly 1 in 2,698,853 residents.
How common is Janiszeski?
Janiszeski ranks #148,665 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 111 people with the surname Janiszeski. That is different from the site's living-bearer estimate (127), 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 Janiszeski.
Has Janiszeski become more or less common over time?
Between 2010 and 2020, the surname Janiszeski went from 115 recorded bearers to 111. That is a decrease of 4 (-3.5%). In the national ranking it fell from #144,141 to #148,665.
What does the Census say about the background of Janiszeski?
Among Census respondents with the surname Janiszeski, the largest self-reported group is White at 94.6%. The next largest groups are Black (1.8%) and Hispanic (1.8%). 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 Janiszeski in the 2020 Census, accounting for 94.6% (105 people in the source table).
What is the full ancestry breakdown?
Janiszeski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.6%), Black (1.8%), Hispanic (1.8%). 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 Janiszeski (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 Janiszeski mean?
Polish surname derived from the personal name "Jan", meaning "God is gracious". 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 Janiszeski (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 Janiszeski?
Our sister site HowManyOfMe.org answers how many people have the last name Janiszeski at a glance, with the living-bearer count up front.