Boys' name · since 1919
Seiichi
Seiichi has 40 recorded births since 1919 in federal Social Security data, most heavily in 1919 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #23,778 of 45,481
- all-time among boys
- 40
- born since 1919
- 1920s
- peak decade
Seiichi sits outside today's top ranks for boys, with 40 recorded since 1919.
According to the U.S. Social Security Administration, Seiichi has been recorded 40 times among boys since 1919, 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 1919 to 1926.
- #23,778 of 45,481 all-time among boys
- 40 born since 1919
- 1920s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Seiichi ranks #23,778 of 45,481 boys' names by all-time recorded births (highest first). 40 born since 1919, peaking in the 1920s.
- #23,778 of 45,481
- all-time among boys
- 40
- born since 1919
- 1920s
- peak decade
Seiichi's 40 recorded births place it above 47.64% of the 45,481 boys names in the full SSA archive.
The state file records this name in 2 jurisdictions, led by California.
Seiichi's usage pattern, beyond the headline number
Seiichi splits its recorded history at 1924: 48% of all births land in the more recent half, 52% in the earlier half, an evenly balanced pattern over time. The single quietest year was 1923 (5 births) -- compare that against the 1919 peak of 8 for a sense of just how much the name's popularity has swung.
Seiichi popularity over time
Annual U.S. births registered with the Social Security Administration · 1919–1926
- Peak year (1919)
- 8
- Annual births at peak, across 8 years of records
Seiichi by decade
1920s is the heaviest window (32 births, 80% of the file).
1920s was Seiichi's strongest decade.
32 babies received the name during that ten-year window, about 80% of all-time use.
Seiichi births by decade
Total births in each ten-year window
- 1910s 8
1910s
8 births
- 1920s
1920s
32 births
What this shows Peak: 1920s at 32 births (80% of all-time use).
Seiichi by state
Where Seiichi concentrates geographically, total births since 1919
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | California | | 5 | 12.5% |
| #2 | Hawaii | | 5 | 12.5% |
5 of 40 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
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What to do with Seiichi's data
- California records the most Seiichis (5 births) -- see the full state breakdown if geography matters to your decision. California names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Seiichi
Nearby Names Like Seiichi
Names with a similar sound, spelling, or feel to Seiichi
Compare Seiichi side by side: Seiichi vs Seiji Seiichi vs Seif Seiichi vs Seichi
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Seiichi: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1919)
Similar record span (~7 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, 1919–1926 (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 Seiichi 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.