Declyn Boy & girl
How popular is Declyn?
#4,538 boy name in 2025
22 baby boys were named Declyn in the US in 2025, making it the 4538th most popular boy name. Another 17 girls got the name (#6,545 for girls).
Declyn popularity over time
Boys Girls
| Rank in 2025 | #4,538 for boys (▲ 525 from 2024) |
|---|---|
| Babies in 2025 | 22 boys, 17 girls |
| 10-year trend | Falling (-29% babies vs 2015) |
| Earlier ranks | #3,512 in 2015, #3,568 in 2020 |
| Peak year | 2016 (41 boys) |
| Highest rank | #2,884 in 2016 |
| First recorded | 2007 |
| Boys vs girls (last 10 years) | 59% boys, 41% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Declyn counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Declan family of names ranked #142 for boys in 2025 (#130 the year before), with 2,746 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Declan | 2,570 | 94% |
| Deklan | 57 | 2% |
| Deklyn | 28 | 1% |
| Decklan | 21 | 1% |
| Declyn | 22 | 1% |
| Deklin | 16 | 1% |
| Decklyn | 16 | 1% |
| Deklen | 11 | 0% |
| Declen | 5 | 0% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Declyn is most popular
Babies named Declyn per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
Declyn by decade
Boy names about as popular as Declyn
Questions
- Is Declyn a boy or girl name?
- Declyn is used for both. Over the last 10 years, 59% of babies named Declyn were boys and 41% were girls.
- How popular is the name Declyn?
- 22 baby boys were named Declyn in the US in 2025, making it the 4538th most popular boy name. Another 17 girls got the name (#6,545 for girls).
- When was Declyn most popular?
- Declyn peaked in 2016, when 41 boys were given the name. Its highest rank was #2,884 in 2016.
- How many people are named Declyn?
- 768 babies have been named Declyn in the US since 1880. We estimate about 764 of them are alive in 2026, with a median age of 8.
- Where is Declyn most popular?
- From 2021 to 2025, Declyn was most common in Florida, at 0.0 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.