2010
#133,048
National surname rank
Recorded bearers 127
First available Census row
Per 100,000 0.04
Very Rare Last name
Theodosiou
A Greek surname derived from the personal name Theodosios, itself from the Greek elements "theos" (God) and "doron" (gift).
According to the 2020 US Census Bureau surname tables, roughly 128 Americans carry the last name Theodosiou. That puts it at #147,954 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,677,768 residents).
This page is the full Name Census profile for the Theodosiou 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.
For British records, Name Census UK has a British surname profile for Theodosiou with 1881 census detail, origin facts and modern UK distribution where available.
Bearers in the US
128
1 in 2,677,768
Census rank
#147,954
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
112
very rare in the US
Popularity narrative
The Census Bureau recorded 112 bearers of the surname Theodosiou in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147954th position in the national surname ranking.
Among Census respondents with the surname Theodosiou, the largest self-reported group is White at 92.0%. The next largest groups are Hispanic (6.3%) and Black (0.9%).
Origin
Meaning and origin of Theodosiou
The surname THEODOSIOU originated from Greece and is derived from the Greek personal name Theodosios, which means "gift of God" and comes from the Greek words "theos" meaning "God" and "doron" meaning "gift". The name can be traced back to the Byzantine era, around the 5th to 6th centuries AD.
THEODOSIOU was initially found in regions of Greece, particularly in the areas of Thessaly, Epirus, and Macedonia. It is likely that the name emerged from these regions and then spread to other parts of the country. Variations in spelling include THEODOSIOU, THEODOSIADES, and THEODOSIANOS.
One of the earliest recorded individuals with the surname THEODOSIOU was Theodosios Theodosiou, a renowned scholar and philosopher who lived in the 12th century. He was known for his writings on philosophy and theology, and his works were widely circulated throughout the Byzantine Empire.
Another notable figure with the surname THEODOSIOU was Georgios Theodosiou, a military commander who fought in the Greek War of Independence against the Ottoman Empire in the early 19th century. He played a crucial role in several battles and was celebrated for his bravery and leadership.
In the 20th century, Nikos Theodosiou (1914-1998) was a prominent Greek writer and journalist. He authored several novels and short stories that explored themes of Greek culture and identity. His works were widely acclaimed and contributed significantly to the literary landscape of modern Greece.
Dimitris Theodosiou (1923-2003) was a celebrated Greek actor who appeared in numerous films and theater productions throughout his career. He was renowned for his versatility and ability to portray a wide range of characters, from comedic roles to dramatic performances.
Another notable figure was Maria Theodosiou (1934-2018), a Greek opera singer who achieved international acclaim for her performances in various operas, including works by composers such as Verdi, Puccini, and Mozart. She was praised for her powerful voice and emotive performances.
While the surname THEODOSIOU has its roots in Greece, it has also been found in other parts of the world, likely due to Greek migration and diaspora communities. However, the name's origins and historical significance remain deeply tied to the Greek culture and heritage.
Demographics
Ancestry and ethnicity for Theodosiou
Among Census respondents with the surname Theodosiou, the largest self-reported group is White at 92.0%. The next largest groups are Hispanic (6.3%) and Black (0.9%).
The bar chart below shows how Theodosiou 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 Theodosiou surname at the time of the 2020 Census, not any inherent property of the name itself.
- White92.0% · 103
- Hispanic or Latino6.3% · 7
- Black or African American0.9% · 1
- American Indian and Alaska Native0.9% · 1
Timeline
Historical Census data for Theodosiou
Theodosiou 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
#147,954
National surname rank
Recorded bearers 112
-15 bearers (-11.8%)
Per 100,000 0.04
Rank movement Down 14,906 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #133,048 | 127 | 0.04 | First available Census row | First available Census row |
| 2020 | #147,954 | 112 | 0.04 | -15 bearers (-11.8%) | Down 14,906 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 Theodosiou 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 | #147,954 | -11.2% |
| Count | 127 | 112 | -11.8% |
| Per 100K | 0.04 | 0.04 | -6.3% |
Between the 2010 and 2020 Census, the number of Theodosiou bearers went from 127 to 112 (-11.8% change). The surname moved down 14,906 positions in the national ranking, going from #133,048 to #147,954.
FAQ
Theodosiou surname: questions and answers
How many people in the U.S. have the surname Theodosiou?
Name Census estimates that about 128 living Americans carry the surname Theodosiou. Using the current population baseline, that works out to roughly 1 in 2,677,768 residents.
How common is Theodosiou?
Theodosiou ranks #147,954 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 112 people with the surname Theodosiou. That is different from the site's living-bearer estimate (128), 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 Theodosiou.
Has Theodosiou become more or less common over time?
Between 2010 and 2020, the surname Theodosiou went from 127 recorded bearers to 112. That is a decrease of 15 (-11.8%). In the national ranking it fell from #133,048 to #147,954.
What does the Census say about the background of Theodosiou?
Among Census respondents with the surname Theodosiou, the largest self-reported group is White at 92.0%. The next largest groups are Hispanic (6.3%) and Black (0.9%). 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 Theodosiou in the 2020 Census, accounting for 92.0% (103 people in the source table).
What is the full ancestry breakdown?
Theodosiou appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (92.0%), Hispanic (6.3%), Black (0.9%). 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 Theodosiou (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 Theodosiou mean?
A Greek surname derived from the personal name Theodosios, itself from the Greek elements "theos" (God) and "doron" (gift). 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 Theodosiou (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 Theodosiou?
For a quick modern take, check how many people have the surname Theodosiou on our sister site HowManyOfMe.org.