Total births
11
Boys' name · since 1918
Rheo
Rheo has 11 recorded births since 1918 in federal Social Security data, most heavily in 2021 -- full year-by-year trend, decade aggregates, and state rankings follow.
- 11
- total births
- 1918–2021
- years on record
- 2020s
- peak decade
- 55%
- born in that decade
11 boys have been named Rheo since 1918, though it isn't currently a top-ranked name.
Rheo has 11 recorded births among boys since 1918, per the U.S. Social Security Administration, though it falls outside today's most-used boys names, busiest in the 2020s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1918 to 2021.
- 11 total births
- 1918–2021 years on record
- 2020s peak decade
- 55% born in that decade
Data updated Jul 2026
The verdict
11 boys have been named Rheo since 1918, peaking in the 2020s, last recorded in 2021.
- 11
- total births
- 1918–2021
- years on record
- 2020s
- peak decade
- 55%
- born in that decade
2020s
Peak decade
55% of everyone ever named Rheo was born in this single decade.
2021
Single peak year
6 babies were named Rheo in 2021 - its busiest year on record.
Rheo's usage pattern, beyond the headline number
Rheo splits its recorded history at 2021: 55% of all births land in the more recent half, 45% in the earlier half, an evenly balanced pattern over time. The single quietest year was 1918 (5 births) -- compare that against the 2021 peak of 6 for a sense of just how much the name's popularity has swung.
Rheo at a glance
Last recorded 2021Peak year
2021
Current rank
Unranked
Active since
1918
Rheo popularity over time
Annual U.S. births registered with the Social Security Administration · 1918–2021
- Peak year (2021)
- 6
- Annual births at peak, across 104 years of records
Rheo by decade
Total births in each ten-year window, peak vs trough at a glance
2020s was Rheo's strongest decade.
6 babies received the name during that ten-year window, about 55% of all-time use.
Rheo births by decade
Total births in each ten-year window
- 1910s
1910s
5 births
- 2020s
2020s
6 births
What this shows Peak: 2020s at 6 births (55% of all-time use).
Frequently Asked Questions
How popular is the name Rheo? ▼
Rheo has been given to 11 babies in the U.S. since 1918, according to SSA data. Its last appearance in the data was 2021. 6 babies were born in 2021, its single highest year.
When was Rheo most popular? ▼
Rheo was most popular in the 2020s decade with 6 total births. The single peak year was 2021.
How long has the name Rheo been used? ▼
Records for Rheo go back to 1918, giving 104 years of history through 2021.
What names are similar to Rheo? ▼
Names with a similar sound or spelling include Rhett, Rhea, Rhen, Rhet, and 4 more. These share a common prefix and are also used for boys.
Keep exploring Rheo
Nearby Names Like Rheo
Names with a similar sound, spelling, or feel to Rheo
Rhett Boy
#174 36,669 births
Rhea Boy
408 births
Rhen Boy
#5129 338 births
Rhet Boy
#11165 237 births
Rhettley Boy
#8887 55 births
Compare Rheo side by side: Rheo vs Rhett Rheo vs Rhea Rheo vs Rhen
Related Names
Names with a similar number of total births
Data Sources
Data as of July 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1918–2021 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Rheo: Baby Name Since 1918 - 11 Births, Peak 2021." NameAlmanac. Accessed via https://namealmanac.com/name/rheo. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Rheo draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of July 2026.