Total births
98
Boys' name · since 2001
Kaiyu
Since 2001, U.S. Social Security records show 98 babies named Kaiyu, peaking in 2001. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- 98
- total births
- 2001–2025
- years on record
- 2000s
- peak decade
- 64%
- born in that decade
98 boys have been named Kaiyu since 2001, though it isn't currently a top-ranked name.
Kaiyu has 98 recorded births among boys since 2001, per the U.S. Social Security Administration, though it falls outside today's most-used boys names, busiest in the 2000s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 2001 to 2025.
- 98 total births
- 2001–2025 years on record
- 2000s peak decade
- 64% born in that decade
Data updated Jul 2026
The verdict
98 boys have been named Kaiyu since 2001, peaking in the 2000s, last recorded in 2025.
- 98
- total births
- 2001–2025
- years on record
- 2000s
- peak decade
- 64%
- born in that decade
2000s
Peak decade
64% of everyone ever named Kaiyu was born in this single decade.
2001
Single peak year
10 babies were named Kaiyu in 2001 - its busiest year on record.
Kaiyu's usage pattern, beyond the headline number
Divide Kaiyu's SSA record in two at 2009 and the more recent half accounts for 42% of all births, the earlier half the remaining 58%, a genuinely balanced usage pattern. Its calmest year was 2005, with only 5 births recorded -- set against the 2001 peak of 10, that's the full swing in one name's fortunes.
Kaiyu at a glance
Last recorded 2025Peak year
2001
Current rank
Unranked
Active since
2001
Kaiyu popularity over time
Annual U.S. births registered with the Social Security Administration · 2001–2025
- Peak year (2001)
- 10
- Annual births at peak, across 25 years of records
Kaiyu by decade
Total births in each ten-year window, peak vs trough at a glance
2000s was Kaiyu's strongest decade.
63 babies received the name during that ten-year window, about 64% of all-time use.
Kaiyu births by decade
Total births in each ten-year window
- 2000s
2000s
63 births
- 2010s 25
2010s
25 births
- 2020s 10
2020s
10 births
What this shows Peak: 2000s at 63 births (64% of all-time use).
Frequently Asked Questions
How popular is the name Kaiyu? ▼
Since 2001, Social Security records show 98 babies named Kaiyu. The most recent recorded year was 2025. Its busiest year on record was 2001, with 10 births.
When was Kaiyu most popular? ▼
Kaiyu was most popular in the 2000s decade with 63 total births. The single peak year was 2001.
How long has the name Kaiyu been used? ▼
Records for Kaiyu go back to 2001, giving 25 years of history through 2025.
What names are similar to Kaiyu? ▼
Names with a similar sound or spelling include Kai, Kaiden, Kairo, Kaison, and 4 more. These share a common prefix and are also used for boys.
What to do with Kaiyu's data
- Kaiyu's decade-level peak was the 2000s (63 total births); usage has since declined to 10 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Kaiyu
Nearby Names Like Kaiyu
Names with a similar sound, spelling, or feel to Kaiyu
Kai Boy
#76 70,232 births
Kaiden Boy
#208 52,562 births
Kairo Boy
#238 11,224 births
Kaison Boy
#515 7,182 births
Kaiser Boy
#801 3,921 births
Compare Kaiyu side by side: Kaiyu vs Kai Kaiyu vs Kaiden Kaiyu vs Kairo
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, 2001–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Kaiyu: Baby Name Since 2001 - 98 Births, Peak 2001." NameAlmanac. Accessed via https://namealmanac.com/name/kaiyu. 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 Kaiyu 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.