Caidyn
#4,419 in 2025UnisexBoys' nameGirls' nameMeaning not yet documented
Caidyn has been given to 1,270 babies in the U.S. since 2000. In 2025 it ranked #4,419 of 13,926 boys’ names in use. Its peak year was 2011, with 64 recorded. It's used for both sexes: 65% boys, 35% girls all-time.
Babies named Caidyn, 2025
1 in 144,000
Caidyn 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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.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 — Caidyn over time
In 2025, Caidyn 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 Caidyn?
Everything below is computed from the 2025 data — the most recent year available.
- Among all babies, 2025
- 1 in 144,000
- 23 of 3,315,165 births
- Among boys only
- 1 in 74,300
- <0.01% of boys
- Rank, 2025
- #4,419
- of 13,926 boys’ names in use
- Coin-flip room size
- 99,910 kids
- Even odds of a second one
Where Caidyn sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 99,910 children born in 2025 and it's an even bet that one of them is another Caidyn. In a class of 30 the chance is Under 1%.
When Caidyns were born
Half of everyone ever recorded as Caidyn was born before 2013 — so the typical Caidyn is around 12 today.
- Biggest decade
- 2010s
- 54.3% of all use
- Born in the last 25 years
- 99.4%
- A modern name
- Recorded since 1950
- 830
- People you could plausibly meet
2010s — 54.3% of all recorded uses (451).
Is Caidyn 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
- −206
- Places dropped
- Rank vs 5 years ago
- −483
- Places dropped
- Rank vs 10 years ago
- −1,388
- Places dropped
- Births vs 10 years ago
- 0.61×
- Fewer babies than then
- Share of its own peak
- 35.9%
- Peak was 2011 (64)
- Years since peak
- 14
- Years
- Year-to-year steadiness
- Shifting
- 24.3% average annual change
Spellings of Caidyn
Caidyn is not the most common spelling — Aiden is, with 33.5% against Caidyn's 0.11%.
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.
Where Caidyn is used — boys
Across 1910–2025, Caidyn was most concentrated in California — about 1 in — boys, against 1 in 607,870 across all states with data. It was least common in Virginia (1 in —).
Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Caidyn has too little recent state data to map, so this covers all years from 1910.
Where Caidyn is used — girls
Across 1910–2025, Caidyn was most concentrated in Ohio — about 1 in — girls, against 1 in 940,889 across all states with data. It was least common in Texas (1 in —).
Shading is the share of that state's recorded girls given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Caidyn has too little recent state data to map, so this covers all years from 1910.
Caidyn around the world
Where Caidyn ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.
- Scotland2009–2009#626in 2009
- Canada2009–2009#2,692in 2009
- South Australia2007–2007#680in 2007
Popularity data from National Records of Scotland, Statistics Canada and Consumer and Business Services (South Australia). NRS data under Open Government Licence v3.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.
Caidyn by the numbers
The raw record for each sex the name is used for.
As a boy's name
Names similar to Caidyn
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Caidyn
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.