2000
#139,757
National surname rank
Recorded bearers 110
First available Census row
Per 100,000 0.04
Very Rare Last name
Quasius
A surname derived from the Latin word "quaesitor" meaning seeker or inquirer.
According to the 2020 US Census Bureau surname tables, roughly 133 Americans carry the last name Quasius. 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 Quasius 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 Quasius 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 Quasius, the largest self-reported group is White at 94.0%. The next largest groups are Hispanic (3.4%) and American Indian/Alaska Native (1.7%).
Origin
Meaning and origin of Quasius
The surname Quasius has its origins in the Germanic regions of central Europe, specifically in areas that are now part of modern-day Germany and Austria. It is believed to have emerged during the Middle Ages, sometime around the 12th or 13th century.
One theory suggests that the name Quasius may have derived from an old Germanic word 'quast,' which referred to a tassel or tuft of feathers, possibly indicating that the name's earliest bearers were involved in the feather trade or related occupations. Another possibility is that it originated as a nickname or descriptive name, describing an individual with tufted or unkempt hair.
Early records of the name Quasius can be found in various medieval documents and manuscripts, including the Codex Diplomaticus Saxoniae Regiae, a collection of charters and documents from the Kingdom of Saxony dating back to the 10th century. The name also appears in the Matricula Studiosorum Academiae Vitebergensis, the student matriculation records of the University of Wittenberg, from the 16th century.
One of the earliest recorded individuals with the surname Quasius was Johannes Quasius, a German clergyman and theologian who lived in the late 15th and early 16th centuries. He was born in the town of Quedlinburg, Saxony, around 1470 and served as a professor of theology at the University of Wittenberg.
Another notable figure was Hans Quasius, a German painter and engraver who lived in the late 16th and early 17th centuries. He was born in the city of Nuremberg around 1560 and is best known for his intricate etchings and engravings depicting religious scenes and landscapes.
In the 18th century, Johann Quasius was a German botanist and naturalist who made significant contributions to the study of plant life. He was born in the town of Zittau, Saxony, in 1720 and is remembered for his extensive collection of botanical specimens and his work on plant taxonomy.
Moving into the 19th century, Karl Quasius was a German engineer and inventor who lived from 1823 to 1903. He is credited with developing several innovations in the field of steam engine technology and is known for his work on improving the efficiency of steam locomotives.
Finally, in the 20th century, Hans-Joachim Quasius was a German architect and urban planner who lived from 1908 to 1996. He played a significant role in the reconstruction and redevelopment of several German cities after World War II, including the city of Hanover, where he worked as the chief city planner for several decades.
Demographics
Ancestry and ethnicity for Quasius
Among Census respondents with the surname Quasius, the largest self-reported group is White at 94.0%. The next largest groups are Hispanic (3.4%) and American Indian/Alaska Native (1.7%).
The bar chart below shows how Quasius 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 Quasius surname at the time of the 2020 Census, not any inherent property of the name itself.
- White94.0% · 109
- Hispanic or Latino3.4% · 4
- American Indian and Alaska Native1.7% · 2
- Two or more races0.9% · 1
Timeline
Historical Census data for Quasius
Quasius 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
#133,048
National surname rank
Recorded bearers 127
+17 bearers (+15.5%)
Per 100,000 0.04
Rank movement Up 6,709 places
2020
#145,028
National surname rank
Recorded bearers 116
-11 bearers (-8.7%)
Per 100,000 0.04
Rank movement Down 11,980 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #139,757 | 110 | 0.04 | First available Census row | First available Census row |
| 2010 | #133,048 | 127 | 0.04 | +17 bearers (+15.5%) | Up 6,709 places |
| 2020 | #145,028 | 116 | 0.04 | -11 bearers (-8.7%) | Down 11,980 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 Quasius 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 | #133,048 | #145,028 | -9.0% |
| Count | 127 | 116 | -8.7% |
| Per 100K | 0.04 | 0.04 | -3.0% |
Between the 2010 and 2020 Census, the number of Quasius bearers went from 127 to 116 (-8.7% change). The surname moved down 11,980 positions in the national ranking, going from #133,048 to #145,028.
FAQ
Quasius surname: questions and answers
How many people in the U.S. have the surname Quasius?
Name Census estimates that about 133 living Americans carry the surname Quasius. Using the current population baseline, that works out to roughly 1 in 2,577,100 residents.
How common is Quasius?
Quasius 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 Quasius. 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 Quasius.
Has Quasius become more or less common over time?
Between 2010 and 2020, the surname Quasius went from 127 recorded bearers to 116. That is a decrease of 11 (-8.7%). In the national ranking it fell from #133,048 to #145,028.
What does the Census say about the background of Quasius?
Among Census respondents with the surname Quasius, the largest self-reported group is White at 94.0%. The next largest groups are Hispanic (3.4%) and American Indian/Alaska Native (1.7%). 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 Quasius in the 2020 Census, accounting for 94.0% (109 people in the source table).
What is the full ancestry breakdown?
Quasius appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (94.0%), Hispanic (3.4%), American Indian/Alaska Native (1.7%). 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 Quasius (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 Quasius mean?
A surname derived from the Latin word "quaesitor" meaning seeker or inquirer. 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 Quasius (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 common is the surname Quasius?
Want to know how many Americans have the surname Quasius? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.