2000
#121,058
National surname rank
Recorded bearers 132
First available Census row
Per 100,000 0.05
Very Rare Last name
Xayachack
A Khmer surname potentially derived from the Sanskrit word for "lotus" or "moon".
According to the 2020 US Census Bureau surname tables, roughly 151 Americans carry the last name Xayachack. That puts it at #133,220 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,269,896 residents).
This page is the full Name Census profile for the Xayachack 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
151
1 in 2,269,896
Census rank
#133,220
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
132
very rare in the US
Popularity narrative
The Census Bureau recorded 132 bearers of the surname Xayachack in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 133220th position in the national surname ranking.
Among Census respondents with the surname Xayachack, the largest self-reported group is Asian/Pacific Islander at 87.9%. The next largest groups are Two or More Races (9.8%) and White (1.5%).
Origin
Meaning and origin of Xayachack
The surname Xayachack has its origins in Southeast Asia, specifically from the region that is modern-day Laos. It is believed to originate from the period during the Lan Xang Kingdom, which existed from 1353 to 1707. The Lan Xang Kingdom was one of the foremost kingdoms in Southeast Asia and covered much of what is today Laos, northeastern Thailand, and parts of Vietnam.
The name Xayachack is derived from the Lao language, where "Xaya" can be traced back to old Lao words which correspond to meanings of "victory" or "success." The suffix "-chack" is less transparent but could be linked to a term denoting "chief" or "leader." Therefore, Xayachack might have been initially used to signify someone who was a victorious leader or a chief known for their successes.
Historical references to the Xayachack surname are sparse, as many old records from the region have been lost or were not written records in the first place. Laos, being primarily an oral culture for much of its history, has fewer manuscripts compared to Western countries. However, some of the earliest instances of the name appear in temple inscriptions and village records from the 18th and 19th centuries.
One of the earliest recorded individuals with the surname Xayachack is Boun Xayachack, a revered community leader born in 1770 who contributed significantly to the local governance of his village in what is now the Champassak Province. Another notable figure is Phomma Xayachack, a nobleman and advisor to the king during the late 18th century. He is believed to have passed away around 1820.
In the late 1800s, Khamphong Xayachack is documented as a respected herbal healer in Luang Prabang, a city that was then the royal capital. His medical practices and formulations are thought to be innovative for the time, blending traditional medicine with some learned practices from neighboring regions.
Moving into the 20th century, Somsanith Xayachack, born in 1905, became a prominent educator and politician in Laos. He was deeply involved in the independence movement against French colonial rule and later served in various capacities in the government of the newly independent Laos before his death in 1962.
Lastly, in the realm of academia, Dr. Viengkeo Xayachack, born in 1943, made significant contributions to Southeast Asian history and anthropology. Her work has been influential in understanding the pre-colonial and colonial history of Laos, and she has published numerous articles and books on the subject.
These individuals highlight the varied roles that bearers of the surname Xayachack have played throughout history, from governance and healing to education and scholarship, emphasizing the rich and diverse legacy carried by this name.
Demographics
Ancestry and ethnicity for Xayachack
Among Census respondents with the surname Xayachack, the largest self-reported group is Asian/Pacific Islander at 87.9%. The next largest groups are Two or More Races (9.8%) and White (1.5%).
The bar chart below shows how Xayachack 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 Xayachack surname at the time of the 2020 Census, not any inherent property of the name itself.
- Asian and Pacific Islander87.9% · 116
- Two or more races9.8% · 13
- White1.5% · 2
- Hispanic or Latino0.8% · 1
Timeline
Historical Census data for Xayachack
Xayachack 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
#124,548
National surname rank
Recorded bearers 138
+6 bearers (+4.5%)
Per 100,000 0.05
Rank movement Down 3,490 places
2020
#133,220
National surname rank
Recorded bearers 132
-6 bearers (-4.3%)
Per 100,000 0.04
Rank movement Down 8,672 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #121,058 | 132 | 0.05 | First available Census row | First available Census row |
| 2010 | #124,548 | 138 | 0.05 | +6 bearers (+4.5%) | Down 3,490 places |
| 2020 | #133,220 | 132 | 0.04 | -6 bearers (-4.3%) | Down 8,672 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 Xayachack 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 | #124,548 | #133,220 | -7.0% |
| Count | 138 | 132 | -4.3% |
| Per 100K | 0.05 | 0.04 | -11.7% |
Between the 2010 and 2020 Census, the number of Xayachack bearers went from 138 to 132 (-4.3% change). The surname moved down 8,672 positions in the national ranking, going from #124,548 to #133,220.
FAQ
Xayachack surname: questions and answers
How many people in the U.S. have the surname Xayachack?
Name Census estimates that about 151 living Americans carry the surname Xayachack. Using the current population baseline, that works out to roughly 1 in 2,269,896 residents.
How common is Xayachack?
Xayachack ranks #133,220 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 132 people with the surname Xayachack. That is different from the site's living-bearer estimate (151), 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 Xayachack.
Has Xayachack become more or less common over time?
Between 2010 and 2020, the surname Xayachack went from 138 recorded bearers to 132. That is a decrease of 6 (-4.3%). In the national ranking it fell from #124,548 to #133,220.
What does the Census say about the background of Xayachack?
Among Census respondents with the surname Xayachack, the largest self-reported group is Asian/Pacific Islander at 87.9%. The next largest groups are Two or More Races (9.8%) and White (1.5%). 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?
Asian/Pacific Islander is the largest self-reported group for the surname Xayachack in the 2020 Census, accounting for 87.9% (116 people in the source table).
What is the full ancestry breakdown?
Xayachack appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Asian/Pacific Islander (87.9%), Two or More Races (9.8%), White (1.5%). 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 Xayachack (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 Xayachack mean?
A Khmer surname potentially derived from the Sanskrit word for "lotus" or "moon". 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 Xayachack (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 Xayachack?
For a quick modern take, check how many Americans have the surname Xayachack on our sister site HowManyOfMe.org.