2010
#159,712
National surname rank
Recorded bearers 101
First available Census row
Per 100,000 0.03
Very Rare Last name
Siudak
A Polish surname likely derived from a nickname referring to someone thin or slim.
According to the 2020 US Census Bureau surname tables, roughly 115 Americans carry the last name Siudak. 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 Siudak 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 Siudak 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 Siudak, the largest self-reported group is White at 100.0%.
Origin
Meaning and origin of Siudak
The surname Siudak has its origins in Poland, with records dating back to the 15th century. It is believed to have derived from the Polish word "siuda," which means "gray-haired" or "old man." This suggests that the name may have initially been a descriptive nickname for someone with gray hair or an elderly person.
The earliest known reference to the Siudak surname can be found in the village of Rybnik, located in the Silesian region of southern Poland. In a document from 1487, a man named Jan Siudak was mentioned as a landowner in the area. This region, known for its rich mining and agricultural history, was likely where the name first gained prominence.
Throughout the subsequent centuries, the Siudak name appeared in various historical records across different parts of Poland. In the 16th century, a coat of arms bearing the Siudak name was registered in the Polish Nobility Rolls, indicating that some members of the family had attained noble status.
One notable individual with the Siudak surname was Aleksander Siudak (1868-1945), a Polish politician and lawyer who served as a member of the Sejm (Polish parliament) in the early 20th century. He was a prominent figure in the Polish Socialist Party and played a key role in the country's struggle for independence.
Another notable Siudak was Wacław Siudak (1892-1942), a Polish military officer and World War I veteran. He fought bravely during the Polish-Soviet War of 1919-1921 and was awarded several military honors for his service.
In the realm of arts and culture, the name Siudak is associated with Czesław Siudak (1920-1996), a renowned Polish sculptor and artist. His works, which often depicted human figures and themes from Polish folklore, can be found in various museums and public spaces across Poland.
The Siudak surname also has a connection to the city of Krakow, one of the oldest and most historically significant cities in Poland. In the 17th century, a family of Siudaks owned a prominent bakery in the city's main square, and their name is mentioned in several historical records related to the local trade guilds.
While the Siudak name originated in Poland, it has since spread to other parts of the world through immigration and diaspora communities. However, its roots and historical significance remain deeply intertwined with the rich cultural heritage of Poland.
Demographics
Ancestry and ethnicity for Siudak
Among Census respondents with the surname Siudak, the largest self-reported group is White at 100.0%.
The bar chart below shows how Siudak 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 Siudak surname at the time of the 2020 Census, not any inherent property of the name itself.
- White100.0% · 100
Timeline
Historical Census data for Siudak
Siudak 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
#155,682
National surname rank
Recorded bearers 100
-1 bearers (-1.0%)
Per 100,000 0.03
Rank movement Up 4,030 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #159,712 | 101 | 0.03 | First available Census row | First available Census row |
| 2020 | #155,682 | 100 | 0.03 | -1 bearers (-1.0%) | Up 4,030 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 Siudak 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 | #159,712 | #155,682 | 2.5% |
| Count | 101 | 100 | -1.0% |
| Per 100K | 0.03 | 0.03 | 11.5% |
Between the 2010 and 2020 Census, the number of Siudak bearers went from 101 to 100 (-1.0% change). The surname moved up 4,030 positions in the national ranking, going from #159,712 to #155,682.
FAQ
Siudak surname: questions and answers
How many people in the U.S. have the surname Siudak?
Name Census estimates that about 115 living Americans carry the surname Siudak. Using the current population baseline, that works out to roughly 1 in 2,980,473 residents.
How common is Siudak?
Siudak 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 Siudak. 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 Siudak.
Has Siudak become more or less common over time?
Between 2010 and 2020, the surname Siudak went from 101 recorded bearers to 100. That is a decrease of 1 (-1.0%). In the national ranking it rose from #159,712 to #155,682.
What does the Census say about the background of Siudak?
Among Census respondents with the surname Siudak, the largest self-reported group is White at 100.0%. 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 Siudak in the 2020 Census, accounting for 100.0% (100 people in the source table).
What is the full ancestry breakdown?
Siudak appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (100.0%). 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 Siudak (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 Siudak mean?
A Polish surname likely derived from a nickname referring to someone thin or slim. 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 Siudak (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 are called Siudak?
You can see how many people have the surname Siudak on our sister site HowManyOfMe.org — same data roots, lighter UI.