Boys' name · since 1914
Iwao
Iwao has 178 recorded births since 1914 in federal Social Security data, most heavily in 1921 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #13,679 of 45,481
- all-time among boys
- 178
- born since 1914
- 1920s
- peak decade
Iwao is not among the current top-ranked boys names; 178 have been recorded since 1914.
According to the U.S. Social Security Administration, Iwao has been recorded 178 times among boys since 1914, though it is not among the currently most-used boys names, with its heaviest use in the 1920s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 1914 to 1936.
- #13,679 of 45,481 all-time among boys
- 178 born since 1914
- 1920s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Iwao ranks #13,679 of 45,481 boys' names by all-time recorded births (highest first). 178 born since 1914, peaking in the 1920s.
- #13,679 of 45,481
- all-time among boys
- 178
- born since 1914
- 1920s
- peak decade
Iwao's 178 recorded births place it above 69.88% of the 45,481 boys names in the full SSA archive.
The state file records this name in 2 jurisdictions, led by Hawaii.
Iwao's usage pattern, beyond the headline number
Divide Iwao's SSA record in two at 1923 and the more recent half accounts for 44% of all births, the earlier half the remaining 56%, a genuinely balanced usage pattern. Its calmest year was 1914, with only 5 births recorded -- set against the 1921 peak of 20, that's the full swing in one name's fortunes.
Iwao popularity over time
Annual U.S. births registered with the Social Security Administration · 1914–1936
- Peak year (1921)
- 20
- Annual births at peak, across 23 years of records
Iwao by decade
1920s is the heaviest window (109 births, 61% of the file).
1920s was Iwao's strongest decade.
109 babies received the name during that ten-year window, about 61% of all-time use.
Iwao births by decade
Total births in each ten-year window
- 1910s
1910s
54 births
- 1920s
1920s
109 births
- 1930s 15
1930s
15 births
What this shows Peak: 1920s at 109 births (61% of all-time use).
Iwao by state
Where Iwao concentrates geographically, total births since 1914
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Hawaii | | 66 | 37.1% |
| #2 | California | | 26 | 14.6% |
66 of 178 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
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What to do with Iwao's data
- Iwao's decade-level peak was the 1920s (109 total births); usage has since declined to 15 in the 1930s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Hawaii records the most Iwaos (66 births) -- see the full state breakdown if geography matters to your decision. Hawaii names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Iwao
Nearby Names Like Iwao
Names with a similar sound, spelling, or feel to Iwao
Compare Iwao side by side: Iwao vs Iwan
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Iwao: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1921)
Similar record span (~22 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, 1914–1936 (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 Iwao 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.