Boys' name · since 1921
Ysidoro
Ysidoro has 35 recorded births since 1921 in federal Social Security data, most heavily in 1929 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #24,826 of 45,481
- all-time among boys
- 35
- born since 1921
- 1920s
- peak decade
Ysidoro is not among the current top-ranked boys names; 35 have been recorded since 1921.
Ysidoro has 35 recorded births among boys since 1921, per the U.S. Social Security Administration, though it falls outside today's most-used boys names, busiest in the 1920s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1921 to 1956.
- #24,826 of 45,481 all-time among boys
- 35 born since 1921
- 1920s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Ysidoro ranks #24,826 of 45,481 boys' names by all-time recorded births (highest first). 35 born since 1921, peaking in the 1920s.
- #24,826 of 45,481
- all-time among boys
- 35
- born since 1921
- 1920s
- peak decade
Ysidoro's 35 recorded births place it above 45.39% of the 45,481 boys names in the full SSA archive.
The state file records this name in 1 jurisdictions, led by Texas.
Ysidoro's usage pattern, beyond the headline number
Ysidoro splits its recorded history at 1928: 54% of all births land in the more recent half, 46% in the earlier half, an evenly balanced pattern over time. The single quietest year was 1921 (5 births) -- compare that against the 1929 peak of 7 for a sense of just how much the name's popularity has swung.
Ysidoro popularity over time
Annual U.S. births registered with the Social Security Administration · 1921–1956
- Peak year (1929)
- 7
- Annual births at peak, across 36 years of records
Ysidoro by decade
1920s is the heaviest window (29 births, 83% of the file).
1920s was Ysidoro's strongest decade.
29 babies received the name during that ten-year window, about 83% of all-time use.
Ysidoro births by decade
Total births in each ten-year window
- 1920s
1920s
29 births
- 1950s 6
1950s
6 births
What this shows Peak: 1920s at 29 births (83% of all-time use).
Ysidoro by state
Where Ysidoro concentrates geographically, total births since 1921
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Texas | | 11 | 31.4% |
11 of 35 births nationwide.
Frequently Asked Questions
How popular is the name Ysidoro? ▼
Where does Ysidoro sit in the SSA name archive? ▼
When was Ysidoro most popular? ▼
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How long has the name Ysidoro been used? ▼
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What to do with Ysidoro's data
- Ysidoro's decade-level peak was the 1920s (29 total births); usage has since declined to 6 in the 1950s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Texas records the most Ysidoros (11 births) -- see the full state breakdown if geography matters to your decision. Texas names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Ysidoro
Nearby Names Like Ysidoro
Names with a similar sound, spelling, or feel to Ysidoro
Compare Ysidoro side by side: Ysidoro vs Ysidro
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Ysidoro: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1929)
Similar record span (~35 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, 1921–1956 (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 Ysidoro 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.