Declyn
#4,574 in 2025UnisexBoys' nameGirls' nameMeaning not yet documented
Declyn has been given to 768 babies in the U.S. since 2007. In 2025 it ranked #4,574 of 13,926 boys’ names in use. Its peak year was 2016, with 41 recorded. It's used for both sexes: 60% boys, 40% girls all-time.
Babies named Declyn, 2025
1 in 151,000
Declyn 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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.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 — Declyn over time
In 2025, Declyn went to 44% girls and 56% 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 Declyn?
Everything below is computed from the 2025 data — the most recent year available.
- Among all babies, 2025
- 1 in 151,000
- 22 of 3,315,165 births
- Among boys only
- 1 in 77,600
- <0.01% of boys
- Rank, 2025
- #4,574
- of 13,926 boys’ names in use
- Coin-flip room size
- 104,451 kids
- Even odds of a second one
Where Declyn 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 104,451 children born in 2025 and it's an even bet that one of them is another Declyn. In a class of 30 the chance is Under 1%.
When Declyns were born
Half of everyone ever recorded as Declyn was born before 2018 — so the typical Declyn is around 7 today.
- Biggest decade
- 2010s
- 59.9% of all use
- Born in the last 25 years
- 100.0%
- A modern name
- Recorded since 1950
- 461
- People you could plausibly meet
2010s — 59.9% of all recorded uses (276).
Is Declyn 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
- +532
- Places climbed
- Rank vs 5 years ago
- −984
- Places dropped
- Rank vs 10 years ago
- −1,041
- Places dropped
- Births vs 10 years ago
- 0.71×
- Fewer babies than then
- Share of its own peak
- 53.7%
- Peak was 2016 (41)
- Years since peak
- 9
- Years
- Year-to-year steadiness
- Volatile
- 27.3% average annual change
Spellings of Declyn
Declyn is not the most common spelling — Declan is, with 71.0% against Declyn's 0.56%.
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 Declyn is used
Across 1910–2025, Declyn was most concentrated in Florida — about 1 in — boys, against 1 in 1,932,027 across all states with data. It was least common in Texas (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. Declyn has too little recent state data to map, so this covers all years from 1910.
Declyn around the world
Where Declyn 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.
- England & Wales1998–2014#4,632in 2014
- Scotland1994–2012#669in 2012
- Canada2007–2018#2,281in 2018
- South Australia2010–2013#754in 2013
Popularity data from Office for National Statistics, National Records of Scotland, Statistics Canada and Consumer and Business Services (South Australia). ONS, NRS data under Open Government Licence v3.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.
Declyn by the numbers
The raw record for each sex the name is used for.
As a boy's name
Names similar to Declyn
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Declyn
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.