Declyn
How to say it: DEK-lin · /ˈdɛklɪn/
Modern American respelling of Irish Declan meaning 'full of goodness' - unisex spelling with trendy -lyn ending.
Declyn was the 150th most popular boys’ name in the United States in 2025, given to 39 babies of either sex (Social Security Administration). The 2020s are its busiest decade so far, its births are down about 32% in ten years, and it is projected to slip to #208 by 2030.
Updated · SSA 2025 data, published May 2026 · Insee 2025 data, published July 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #150 |
|---|---|
| Babies born in 2025 (both sexes) | 39 |
| Share of births | 1 in 1,238 |
| Peak decade | 2020s |
| Change over 10 years | −32% |
| Projected rank for 2030 (estimate) | #208 |
| In France, 2025 | #2,436 among boys’ names, 0 births |
Sources: Social Security Administration (SSA), Insee (France). How we compute these figures.
Its life, decade by decade
Declyn is a newcomer: almost all of its history is from the last forty years.
What goes with it
Nicknames
- Dec
- Deck
- Lyn
Honouring a Declyn in the family
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Declyn is about 1 in 52.
Around the world
This spelling is used in English, Irish.
In France: #2,436 for boys in 2025.
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