2000
#133,114
National surname rank
Recorded bearers 117
First available Census row
Per 100,000 0.04
Very Rare Last name
Tadajewski
A Polish surname derived from a nickname or personal name meaning "one from Tadajewo".
According to the 2020 US Census Bureau surname tables, roughly 133 Americans carry the last name Tadajewski. 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 Tadajewski 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 Tadajewski 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 Tadajewski, the largest self-reported group is White at 94.8%. The next largest groups are Hispanic (2.6%) and Two or More Races (2.6%).
Origin
Meaning and origin of Tadajewski
The surname Tadajewski is of Polish origin, traced back to the 16th century when it first appeared in historical records. It is believed to have originated in the region of Masovia, central Poland. The name is derived from the old Polish words "tad" meaning "there" and "jewski" which is a possessive suffix, indicating the name may have referred to someone from a specific place or village.
One of the earliest documented references to the Tadajewski name can be found in the parish records of the village of Grodzisk Mazowiecki, dated 1593. These records mention a Maciej Tadajewski, a local landowner and farmer. Further mentions of the name appear in tax records and land ownership documents throughout the 17th and 18th centuries, primarily in the villages and towns around Warsaw.
In the 19th century, the Tadajewski name began to spread more widely across Poland. Notable individuals from this period include Jakub Tadajewski (1810-1892), a prominent lawyer and legal scholar who published several influential works on Polish civil law. Another individual of note was Marianna Tadajewska (1834-1901), a renowned educator who founded one of the first schools for girls in Warsaw.
As Polish migration increased in the late 19th and early 20th centuries, the Tadajewski name began to appear in other parts of Europe and the Americas. Antoni Tadajewski (1865-1938) was a Polish-American engineer who worked on several major infrastructure projects in New York City. Meanwhile, Feliks Tadajewski (1879-1951) was a notable Polish painter and art professor who taught at the Academy of Fine Arts in Krakow.
In more recent history, Zbigniew Tadajewski (1922-2007) was a highly decorated Polish soldier who fought in World War II and later became a respected military historian and author. His cousin, Wanda Tadajewska (1930-2018), was a renowned opera singer who performed leading roles at major opera houses across Europe.
While the Tadajewski name has undergone various spelling variations over the centuries, such as Tadajewsky, Tadayewski, and Tadaiewski, its Polish roots and historical significance remain firmly embedded in its origins and heritage.
Demographics
Ancestry and ethnicity for Tadajewski
Among Census respondents with the surname Tadajewski, the largest self-reported group is White at 94.8%. The next largest groups are Hispanic (2.6%) and Two or More Races (2.6%).
The bar chart below shows how Tadajewski 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 Tadajewski surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.8% · 110
- Hispanic or Latino2.6% · 3
- Two or more races2.6% · 3
Timeline
Historical Census data for Tadajewski
Tadajewski 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
#136,449
National surname rank
Recorded bearers 123
+6 bearers (+5.1%)
Per 100,000 0.04
Rank movement Down 3,335 places
2020
#145,028
National surname rank
Recorded bearers 116
-7 bearers (-5.7%)
Per 100,000 0.04
Rank movement Down 8,579 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #133,114 | 117 | 0.04 | First available Census row | First available Census row |
| 2010 | #136,449 | 123 | 0.04 | +6 bearers (+5.1%) | Down 3,335 places |
| 2020 | #145,028 | 116 | 0.04 | -7 bearers (-5.7%) | Down 8,579 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 Tadajewski 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 | #136,449 | #145,028 | -6.3% |
| Count | 123 | 116 | -5.7% |
| Per 100K | 0.04 | 0.04 | -3.0% |
Between the 2010 and 2020 Census, the number of Tadajewski bearers went from 123 to 116 (-5.7% change). The surname moved down 8,579 positions in the national ranking, going from #136,449 to #145,028.
FAQ
Tadajewski surname: questions and answers
How many people in the U.S. have the surname Tadajewski?
Name Census estimates that about 133 living Americans carry the surname Tadajewski. Using the current population baseline, that works out to roughly 1 in 2,577,100 residents.
How common is Tadajewski?
Tadajewski 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 Tadajewski. 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 Tadajewski.
Has Tadajewski become more or less common over time?
Between 2010 and 2020, the surname Tadajewski went from 123 recorded bearers to 116. That is a decrease of 7 (-5.7%). In the national ranking it fell from #136,449 to #145,028.
What does the Census say about the background of Tadajewski?
Among Census respondents with the surname Tadajewski, the largest self-reported group is White at 94.8%. The next largest groups are Hispanic (2.6%) and Two or More Races (2.6%). 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 Tadajewski in the 2020 Census, accounting for 94.8% (110 people in the source table).
What is the full ancestry breakdown?
Tadajewski appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.8%), Hispanic (2.6%), Two or More Races (2.6%). 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 Tadajewski (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 Tadajewski mean?
A Polish surname derived from a nickname or personal name meaning "one from Tadajewo". 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 Tadajewski (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 Tadajewski?
Our sister site HowManyOfMe.org answers how many Americans have the surname Tadajewski at a glance, with the living-bearer count up front.