Rheo
Of Greek origin meaning "to flow or stream".
Name Census estimates that about 6 living Americans carry the first name Rheo. The name is used almost exclusively for boys. The average person named Rheo today is around 7 years old, and the year with the single highest number of Rheo births was 2021 (6 babies).
This page is the full Name Census profile for Rheo. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
For a British comparison, Name Census UK has a UK baby-name profile for Rheo with official rankings and popularity over time.
Key insights
- • Fewer than 100 living Americans are believed to carry the name Rheo. It is among the rarest names in the SSA records.
People living today
6
~ 1 in 57,125,723 Americans
Peak year
2021
6 babies that year
Average age
7
years old
2021 SSA rank
#11,829
Tracked since 1918
Popularity
Rheo: popularity over time
The SSA tracks Rheo from the 1910s through to the 2020s, spanning 2 decades of birth certificate data. The biggest single decade for the name was the 2020s, with 6 total registrations. The name continues to be given at rates close to its all-time high, suggesting it has not yet fallen out of fashion.
Babies born per year
Decades
Rheo by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Rheo during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Origin
Meaning and history of Rheo
The name Rheo is a unique and intriguing one, with roots that can be traced back to ancient Greece. Derived from the Greek word "rheo," which means "to flow" or "to stream," this name has a strong connection to the natural world and the perpetual motion of water.
In ancient Greek mythology, several figures bore names related to this root word, such as Rhea, the primordial goddess of fertility and the flow of life. Additionally, the word "rheo" is found in various scientific contexts, such as rheology, the study of the flow and deformation of matter.
The earliest recorded instances of the name Rheo can be found in historical documents from the Byzantine era, where it was occasionally used as a feminine name. However, it was not until the 19th century that the name gained some popularity in certain parts of Europe.
One of the earliest notable individuals with the name Rheo was Rheo Jane Lowe (1823-1900), a British social reformer and writer who advocated for women's rights and education. She was a prominent figure in the Victorian era and wrote several influential works on the roles and responsibilities of women in society.
Another historical figure bearing the name Rheo was Rheo Marcelle (1888-1967), a French painter and sculptor who was part of the Cubist movement. Her works, which often featured abstract representations of the human form, were exhibited in various galleries across Europe.
In the 20th century, Rheo Hampton (1917-2004), an American jazz singer and actress, gained recognition for her performances in Broadway musicals and her collaborations with renowned musicians like Duke Ellington and Count Basie.
Rheo Antonia (1936-2011), a Greek-American artist and academic, made significant contributions to the field of ceramic art. Her sculptures and installations were exhibited in numerous galleries and museums, and she taught at several prestigious institutions, including the Rhode Island School of Design.
Lastly, Rheo Maureen (1951-present), a Canadian playwright and director, has received critical acclaim for her works that explore themes of identity, culture, and social issues. Her plays have been staged both nationally and internationally, and she has been recognized with various awards and honors for her contributions to the theater arts.
While the name Rheo may not be as common as some other names, it carries a rich history and a unique connection to the natural world, making it a distinctive choice for those seeking a name with a touch of ancient Greek flair.
People
Rheo + last name combinations
How many people share a full name with Rheo as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with R
Other first names starting with R with a similar number of bearers.
FAQ
Rheo: questions and answers
How many people in the U.S. are named Rheo?
Name Census puts the figure at roughly 6 living Americans. We arrive at this by taking every SSA birth registration for Rheo going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 57,125,723 US residents.
Is Rheo a common name?
We classify Rheo as "Very Rare". It ranks above 22.3% of all first names in the SSA dataset by living bearers. Across the full history of the data, 11 babies have been registered with this name.
When was Rheo most popular?
The single biggest year for Rheo was 2021, when 6 babies received the name. The fact that the average living Rheo is about 7 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Rheo in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Rheo a male name?
Yes, 100.0% of people registered as Rheo in the SSA data are male. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Rheo still being used today?
Yes. The SSA still recorded Rheo in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Rheo can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
Does every first name have Census demographic data?
No. The public Census first-name release only covers names that met the Bureau's publication rules, so many rarer names in the SSA files do not have a published Census demographic snapshot. In those cases, the page still shows the SSA trend, gender history, and state data.
How many people have the name Rheo?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.