Kaigen
UnisexBoys' nameGirls' nameMeaning not yet documented
Kaigen has been given to 38 babies in the U.S. since 2007. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 2010, with 8 recorded. It's used for both sexes: 87% boys, 13% girls all-time.
Babies named Kaigen, 2013
1 in 729,000
Kaigen over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
Girls or boys — Kaigen over time
In 2013, Kaigen went to 0% girls and 100% boys.
A sex is only published in years it reached five applications, so a stretch at 0% or 100% means the other side stayed under that floor — not that it was never used.
How common is Kaigen?
Kaigen had fewer than 5 recorded uses in 2025, so these figures use 2013, the last year it was published.
- Among all babies, 2013
- 1 in 729,000
- 5 of 3,645,938 births
- Among boys only
- 1 in 378,000
- <0.01% of boys
- Rank, 2013
- Unranked
- Fewer than 5 uses
- Coin-flip room size
- 505,435 kids
- Even odds of a second one
Where Kaigen sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2013 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 505,435 children born in 2013 and it's an even bet that one of them is another Kaigen. In a class of 30 the chance is Under 1%.
When Kaigens were born
Half of everyone ever recorded as Kaigen was born before 2010 — so the typical Kaigen is around 15 today.
- Biggest decade
- 2010s
- 63.6% of all use
- Born in the last 25 years
- 100.0%
- A modern name
- Recorded since 1950
- 33
- People you could plausibly meet
2010s — 63.6% of all recorded uses (21).
Is Kaigen rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- —
- Not ranked then
- Rank vs 5 years ago
- New entry
- Not ranked then
- Rank vs 10 years ago
- —
- Not ranked then
- Births vs 10 years ago
- —
- Not published both years
- Share of its own peak
- 0%
- Peak was 2010 (8)
- Years since peak
- 15
- Years
- Year-to-year steadiness
- Very steady
- 0% average annual change
Spellings of Kaigen
Kaigen is not the most common spelling — Aiden is, with 39.1% against Kaigen's <0.01%.
Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.
Kaigen by the numbers
The raw record for each sex the name is used for.
As a boy's name
Names similar to Kaigen
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Kaigen
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.