Total births
28
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.
- 28
- total births
- 2008–2025
- years on record
- 2020s
- peak decade
- 61%
- born in that decade
Siwoo is not among the current top-ranked boys names; 28 have been recorded since 2008.
Siwoo has 28 recorded births among boys since 2008, 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 2008 to 2025.
- 28 total births
- 2008–2025 years on record
- 2020s peak decade
- 61% born in that decade
Data updated Jul 2026
The verdict
28 boys have been named Siwoo since 2008, peaking in the 2020s, last recorded in 2025.
- 28
- total births
- 2008–2025
- years on record
- 2020s
- peak decade
- 61%
- born in that decade
2020s
Peak decade
61% of everyone ever named Siwoo was born in this single decade.
2025
Single peak year
7 babies were named Siwoo in 2025 - its busiest year on record.
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 at a glance
Last recorded 2025Peak year
2025
Current rank
Unranked
Active since
2008
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
Total births in each ten-year window, peak vs trough at a glance
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
How popular is the name Siwoo? ▼
28 babies have been named Siwoo since 2008. It was last recorded in 2025. The peak year was 2025 with 7 births.
When was Siwoo most popular? ▼
Siwoo was most popular in the 2020s decade with 17 total births. The single peak year was 2025.
How long has the name Siwoo been used? ▼
Siwoo has been recorded in Social Security data since 2008, spanning 18 years of data through 2025.
Keep exploring Siwoo
Related Names
Names with a similar number of total births
Data Sources
Data as of July 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).
Cite this page
NameAlmanac Editorial. "Siwoo: Baby Name Since 2008 - 28 Births, Peak 2025." NameAlmanac. Accessed via https://namealmanac.com/name/siwoo. Licensed CC BY-SA 4.0.
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 July 2026.