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.
- #34,018 of 45,481
- all-time among boys
- 11
- born since 1918
- 2020s
- peak 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.
- #34,018 of 45,481 all-time among boys
- 11 born since 1918
- 2020s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Rheo ranks #34,018 of 45,481 boys' names by all-time recorded births (highest first). 11 born since 1918, peaking in the 2020s.
- #34,018 of 45,481
- all-time among boys
- 11
- born since 1918
- 2020s
- peak decade
Rheo's 11 recorded births place it above 24.53% of the 45,481 boys names in the full SSA archive.
No state rows cleared SSA’s public reporting threshold for this name.
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 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
2020s is the heaviest window (6 births, 55% of the file).
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
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Keep exploring Rheo
Nearby Names Like Rheo
Names with a similar sound, spelling, or feel to Rheo
Compare Rheo side by side: Rheo vs Rhett Rheo vs Rhea Rheo vs Rhen
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Rheo: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~2021)
Similar record span (~103 yrs)
Peak year is the single SSA year with the most births for that name; record span is first-to-latest year in the national files, not a recommendation or shared origin claim.
Data Sources
Data as of August 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).
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 August 2026.