Boys' name · since 2008
Siwoo
Since 2008, U.S. Social Security records show 28 babies named Siwoo, peaking in 2025. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- #26,518 of 45,481
- all-time among boys
- #10,316 of 13,930
- 2025 SSA year
- 28
- born since 2008
- 2020s
- peak decade
Yes -- Siwoo is the #10316 most popular boys' name in the U.S. today, with 28 recorded since 2008.
Siwoo has 28 recorded births among boys since 2008, per the U.S. Social Security Administration, ranked #10316 as of the latest data, more common than 26% of boys, 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 2008 to 2025.
- #26,518 of 45,481 all-time among boys
- #10,316 of 13,930 2025 SSA year
- 28 born since 2008
- 2020s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Siwoo ranks #26,518 of 45,481 boys' names by all-time recorded births (highest first) and #10,316 of 13,930 among boys' names in 2025. 28 born since 2008, peaking in the 2020s.
- #26,518 of 45,481
- all-time among boys
- #10,316 of 13,930
- 2025 SSA year
- 28
- born since 2008
- 2020s
- peak decade
Siwoo's 28 recorded births place it above 41.62% of the 45,481 boys names in the full SSA archive.
No state rows cleared SSA’s public reporting threshold for this name.
How Siwoo compares
28 11th percentile among 13,930 names currently given to boys
Based on all-time total births among currently-ranked boys names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Siwoo's all-time total is 92% below the median boys name, and Liam still leads by a wide margin.
| Metric | Siwoo | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 28 | 369 | 358,536 |
| Peak-year births | 7 | 34 | 22,252 |
Siwoo's usage pattern, beyond the headline number
Siwoo splits its recorded history at 2022: 61% of all births land in the more recent half, 39% in the earlier half, a lean toward present-day use rather than a passing spike. The single quietest year was 2008 (5 births) -- compare that against the 2025 peak of 7 for a sense of just how much the name's popularity has swung.
Siwoo popularity over time
Annual U.S. births registered with the Social Security Administration · 2008–2025
- Peak year (2025)
- 7
- Annual births at peak, across 18 years of records
Siwoo by decade
2020s is the heaviest window (17 births, 61% of the file).
2020s was Siwoo's strongest decade.
17 babies received the name during that ten-year window, about 61% of all-time use.
Siwoo births by decade
Total births in each ten-year window
- 2000s 5
2000s
5 births
- 2010s 6
2010s
6 births
- 2020s
2020s
17 births
What this shows Peak: 2020s at 17 births (61% of all-time use).
Frequently Asked Questions
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Keep exploring Siwoo
Related Names
Names with a similar popularity rank to Siwoo
Nationwide names with similar peak year or record span
Two nationwide peer axes for Siwoo: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~2025)
Similar record span (~17 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, 2008–2025 (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 Siwoo 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.