2010
#148,347
National surname rank
Recorded bearers 111
First available Census row
Per 100,000 0.04
Very Rare Last name
Bjornsson
An Icelandic patronymic surname meaning "son of Björn" (the bear).
According to the 2020 US Census Bureau surname tables, roughly 126 Americans carry the last name Bjornsson. That puts it at #149,446 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,720,273 residents).
This page is the full Name Census profile for the Bjornsson 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
126
1 in 2,720,273
Census rank
#149,446
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
110
very rare in the US
Popularity narrative
The Census Bureau recorded 110 bearers of the surname Bjornsson in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 149446th position in the national surname ranking.
Among Census respondents with the surname Bjornsson, the largest self-reported group is White at 86.4%. The next largest groups are Hispanic (6.4%) and Two or More Races (5.5%).
Origin
Meaning and origin of Bjornsson
The surname Bjornsson originates from Iceland and its roots can be traced back to the Viking Age, around the 9th to 11th centuries. It is a patronymic surname, meaning it was originally formed by adding the suffix "-son" to the father's given name, in this case "Bjorn" which translates to "bear" in Old Norse.
The earliest recorded instances of the name Bjornsson can be found in the Icelandic sagas and chronicles from the medieval period. These sagas often mention various individuals with the surname, such as the renowned poet and scholar Bjorn Bjornsson, who lived in the 12th century.
During the settlement of Iceland in the 9th and 10th centuries, many Vikings with the given name Bjorn established farms and homesteads across the island. As a result, their descendants adopted the patronymic surname Bjornsson, which became widespread in various regions of Iceland.
One of the most notable historical figures with the surname Bjornsson was Sveinn Bjornsson (1247-1317), an Icelandic chieftain and lawspeaker who played a significant role in the political and judicial affairs of the island during the late 13th and early 14th centuries.
In the 16th century, Gudbrandur Bjornsson (1542-1628) was a prominent Icelandic bishop and scholar who contributed to the translation of religious texts into Icelandic. He is considered one of the founders of modern Icelandic literature.
Another notable individual with the surname was Halldór Bjornsson (1796-1876), an Icelandic poet and writer who was a leading figure in the Icelandic Romantic movement. His works, including the epic poem "The Saga of Gunnar on Ljosvetninga," played a significant role in reviving interest in Icelandic folklore and mythology.
During the 20th century, several individuals with the surname Bjornsson achieved recognition in various fields. One example is Þórir Bjornsson (1893-1971), an Icelandic politician and diplomat who served as the Minister of Foreign Affairs and as the country's ambassador to the United States.
It is worth noting that the surname Bjornsson has undergone various spelling variations over time, such as Björnsson, Biörnsson, and Biornsson, reflecting the evolution of the Icelandic language and orthography.
Demographics
Ancestry and ethnicity for Bjornsson
Among Census respondents with the surname Bjornsson, the largest self-reported group is White at 86.4%. The next largest groups are Hispanic (6.4%) and Two or More Races (5.5%).
The bar chart below shows how Bjornsson 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 Bjornsson surname at the time of the 2020 Census, not any inherent property of the name itself.
- White86.4% · 95
- Hispanic or Latino6.4% · 7
- Two or more races5.5% · 6
- Asian and Pacific Islander1.8% · 2
Timeline
Historical Census data for Bjornsson
Bjornsson 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
#149,446
National surname rank
Recorded bearers 110
-1 bearers (-0.9%)
Per 100,000 0.04
Rank movement Down 1,099 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 | #149,446 | 110 | 0.04 | -1 bearers (-0.9%) | Down 1,099 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 Bjornsson 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 | #149,446 | -0.7% |
| Count | 111 | 110 | -0.9% |
| Per 100K | 0.04 | 0.04 | -8.0% |
Between the 2010 and 2020 Census, the number of Bjornsson bearers went from 111 to 110 (-0.9% change). The surname moved down 1,099 positions in the national ranking, going from #148,347 to #149,446.
FAQ
Bjornsson surname: questions and answers
How many people in the U.S. have the surname Bjornsson?
Name Census estimates that about 126 living Americans carry the surname Bjornsson. Using the current population baseline, that works out to roughly 1 in 2,720,273 residents.
How common is Bjornsson?
Bjornsson ranks #149,446 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 110 people with the surname Bjornsson. That is different from the site's living-bearer estimate (126), 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 Bjornsson.
Has Bjornsson become more or less common over time?
Between 2010 and 2020, the surname Bjornsson went from 111 recorded bearers to 110. That is a decrease of 1 (-0.9%). In the national ranking it fell from #148,347 to #149,446.
What does the Census say about the background of Bjornsson?
Among Census respondents with the surname Bjornsson, the largest self-reported group is White at 86.4%. The next largest groups are Hispanic (6.4%) and Two or More Races (5.5%). 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?
White is the largest self-reported group for the surname Bjornsson in the 2020 Census, accounting for 86.4% (95 people in the source table).
What is the full ancestry breakdown?
Bjornsson appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (86.4%), Hispanic (6.4%), Two or More Races (5.5%). 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 Bjornsson (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 Bjornsson mean?
An Icelandic patronymic surname meaning "son of Björn" (the bear). 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 Bjornsson (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 Bjornsson?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.