Boy · #8,287 in 2026

Kaisei

Name: Popularity of the name Kaisei in U.S. births, 1880–2026
Creator: U.S. Social Security Administration
License: https://www.ssa.gov/foia/
Keywords: Kaisei, baby name, popularity, U.S., SSA, rankings

Current Rank

#8,287

Peak Rank

#7,590 (2007)

Total Babies

131

5-Yr Trend

+1%

2005

First Year

2024

Last Year

2007

Peak Year

#7590

Peak Rank

131

Total Count

Years Active

The Story of Kaisei

Kaisei first appeared in U.S. Social Security Administration records as a baby boy name in 2005, with 5 babies given the name that year. Its peak popularity came in 2007, when 10 Kaiseis were born — ranking #7,590 that year. As of 2026, Kaisei ranks #8,287 for baby boys with 9 births, holding steady (+1%). In total, more than 131 Kaiseis have been born in the U.S. since records began in 1880, spanning the 2000s through the 2020s.

Popularity Over Time

Popularity by State

Top 10

11-50

51-100

101-500

500+

No data

Names that sound like Kaisei

Phonetically similar names — useful when Kaisei is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.

Ksa
Ksu
Kso
Ksi
Kay
Cay
Cae
Kaye
Kes
Quet
Cks
Kae

Source: Datamuse . Phonetic similarity ranking, not curated.

Frequently Asked Questions about Kaisei

What does the name Kaisei mean?

Kaisei is a boy's name that has been used in U.S. records since 2005. Behind the Name doesn't list a specific etymology, but the name has remained in use across multiple decades.

How popular is Kaisei in 2026?

In 2026, Kaisei ranks #8,287 among boys' names in the U.S., with 9 babies given the name that year.

When was Kaisei most popular?

Kaisei reached its peak popularity in 2007, ranking #7,590 that year with 10 babies given the name.

In which U.S. states is Kaisei most popular?

Kaisei has historically been most popular in California. Rankings vary year to year, but these states show the strongest concentration of births named Kaisei.

Is Kaisei a unisex name?

In U.S. Social Security records, Kaisei is primarily a boy's name. We don't have meaningful data for it as a girl's name.

What names go well with Kaisei?

Names that share a similar style or popularity range with Kaisei include Juell, Rease, Arly. These pairings are based on rank proximity and naming era in U.S. data.

About the name Kaisei

Kaisei is a boy baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 2005 and has accumulated 131 births in the dataset. Kaisei's peak popularity came in 2007 when it ranked #7,590. Use the chart and map above to compare Kaisei's trajectory across years and U.S. states, or browse the related names section to discover similar choices.

Continue exploring

Data sources

Birth statistics (counts, ranks, years 1880–2026) — U.S. Social Security Administration . Predictions for years not yet released by SSA are computed by Peek a Name from historical trends; we update with official data as soon as it ships.
Etymology, cultural origins, and related forms — Behind the Name (used under their public API terms).
Meaning prose and editorial summary — Wikipedia article extracts, licensed under CC BY-SA 3.0 .
Predicted nationality distribution — Nationalize.io .
Phonetically similar names — Datamuse .

Peek a Name aggregates and presents the above data for informational purposes. Statistical predictions and external attributions are clearly labelled where shown; we make no guarantee of accuracy beyond what each source provides.