2010
#148,347
National surname rank
Recorded bearers 111
First available Census row
Per 100,000 0.04
Very Rare Last name
Rosloniec
A surname of Polish origin, possibly derived from a place name or occupation.
According to the 2020 US Census Bureau surname tables, roughly 139 Americans carry the last name Rosloniec. That puts it at #141,309 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,465,859 residents).
This page is the full Name Census profile for the Rosloniec 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
139
1 in 2,465,859
Census rank
#141,309
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
121
very rare in the US
Popularity narrative
The Census Bureau recorded 121 bearers of the surname Rosloniec in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 141309th position in the national surname ranking.
Among Census respondents with the surname Rosloniec, the largest self-reported group is White at 95.0%. The next largest groups are Hispanic (2.5%) and Black (0.8%).
Origin
Meaning and origin of Rosloniec
The surname Rosloniec is believed to have originated in Poland in the late 15th or early 16th century. It is thought to be derived from the Polish words "ros" meaning "dew" and "loniec" meaning "meadow," suggesting the name may have referred to someone who lived near or worked on a dewy meadow.
One of the earliest recorded instances of the Rosloniec surname dates back to 1512, when a Maciej Rosloniec was mentioned in a land registry document from the village of Krosno in southern Poland. In the 16th and 17th centuries, the name appeared sporadically in various records from the regions of Lesser Poland and Galicia, with variations in spelling such as Roslonietz, Rozloniec, and Rozlonietz.
One notable individual with the Rosloniec surname was Jan Rosloniec (1605-1673), a Polish military officer who served in the Polish-Muscovite War of 1654-1667 and became renowned for his bravery in battle. Another was Katarzyna Rosloniec (1718-1792), a landowner and philanthropist who established several charitable institutions in the town of Jaroslaw.
In the 19th century, the Rosloniec surname appeared to be concentrated in the areas around the cities of Krakow and Rzeszow. A Franciszek Rosloniec (1825-1901) from Krakow was a respected scholar and educator who wrote several books on Polish history and literature.
Moving into the 20th century, a Wladyslaw Rosloniec (1890-1965) was a prominent lawyer and judge in Lviv, while Tadeusz Rosloniec (1922-1998) was a renowned artist and sculptor whose works can be found in galleries across Poland.
While the Rosloniec surname is not among the most common in Poland, it has a rich history and has been borne by notable individuals in various fields throughout the centuries.
Demographics
Ancestry and ethnicity for Rosloniec
Among Census respondents with the surname Rosloniec, the largest self-reported group is White at 95.0%. The next largest groups are Hispanic (2.5%) and Black (0.8%).
The bar chart below shows how Rosloniec 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 Rosloniec surname at the time of the 2020 Census, not any inherent property of the name itself.
- White95.0% · 115
- Hispanic or Latino2.5% · 3
- Black or African American0.8% · 1
- American Indian and Alaska Native0.8% · 1
- Two or more races0.8% · 1
Timeline
Historical Census data for Rosloniec
Rosloniec 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
#141,309
National surname rank
Recorded bearers 121
+10 bearers (+9.0%)
Per 100,000 0.04
Rank movement Up 7,038 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #148,347 | 111 | 0.04 | First available Census row | First available Census row |
| 2020 | #141,309 | 121 | 0.04 | +10 bearers (+9.0%) | Up 7,038 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 Rosloniec 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 | #148,347 | #141,309 | 4.7% |
| Count | 111 | 121 | 9.0% |
| Per 100K | 0.04 | 0.04 | 1.2% |
Between the 2010 and 2020 Census, the number of Rosloniec bearers went from 111 to 121 (+9.0% change). The surname moved up 7,038 positions in the national ranking, going from #148,347 to #141,309.
FAQ
Rosloniec surname: questions and answers
How many people in the U.S. have the surname Rosloniec?
Name Census estimates that about 139 living Americans carry the surname Rosloniec. Using the current population baseline, that works out to roughly 1 in 2,465,859 residents.
How common is Rosloniec?
Rosloniec ranks #141,309 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 121 people with the surname Rosloniec. That is different from the site's living-bearer estimate (139), 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 Rosloniec.
Has Rosloniec become more or less common over time?
Between 2010 and 2020, the surname Rosloniec went from 111 recorded bearers to 121. That is an increase of 10 (+9.0%). In the national ranking it rose from #148,347 to #141,309.
What does the Census say about the background of Rosloniec?
Among Census respondents with the surname Rosloniec, the largest self-reported group is White at 95.0%. The next largest groups are Hispanic (2.5%) and Black (0.8%). 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 Rosloniec in the 2020 Census, accounting for 95.0% (115 people in the source table).
What is the full ancestry breakdown?
Rosloniec appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (95.0%), Hispanic (2.5%), Black (0.8%). 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 Rosloniec (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 Rosloniec mean?
A surname of Polish origin, possibly derived from a place name or occupation. 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 Rosloniec (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 share the surname Rosloniec?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.