Declan
- Pronunciation
- [Dec-lan]
- Gender
- Male
- Meaning
- The Name Of An Irish Saint.
- Origin
- Irish
About the Name Declan
Declan is the English form of the Irish Gaelic Deaglán, traditionally interpreted as "full of goodness" or "man of prayer" — though the precise etymology is contested. The name's Christian anchor is Saint Declan of Ardmore (5th century), one of the legendary pre-Patrician Irish saints who, according to tradition, established Christianity in the southeast of Ireland (modern County Waterford) before the arrival of Saint Patrick. His shrine at Ardmore became one of the major medieval Irish pilgrimage sites.
The name was used continuously in Ireland for over 1,500 years but was almost entirely unused outside Ireland until the late 20th century. The contemporary American adoption is part of the broader Irish-Gaelic naming wave alongside Aiden, Liam, and Connor. The single most influential modern fictional Declan is probably Declan Harp, the protagonist of the Discovery Channel series Frontier (2016-2018), played by Jason Momoa. Earlier, the British band Declan contributed minor seeding.
Declan's American climb is one of the more dramatic recent boys'-naming surges: from outside the US top 500 in 1995 to the top 100 by 2010 and the top 75 by 2018. The name's appeal is its compact Irish elegance — two short syllables, soft consonants, distinctly Celtic without obscurity, and tonal versatility across casual and formal registers. The name's historical anchor in pre-Patrician Irish Christianity gives it an unusually layered religious-historical depth for a modern American name. Common nicknames Dec, Dexie, and the rare Lee each carry distinct registers; the original Irish Deaglán remains in use in Ireland. There are no significant international variants since the name's spread is essentially Irish-to-American.
Source: U.S. Social Security Administration name data, 1880–2024 (methodology). By Marvin Tang.
Quick Facts About Declan
US Popularity History (2000–2025)
Annual US births named Declan by gender, from US Social Security Administration records. Peak year: 2019 with 3,971 boys named Declan (boy rank #95 that year).
Where it stands today: in 2025, ranked #139 for boys (2,570 US births). That's 44 places below its 2019 peak.
Source: US Social Security Administration. Limitations: US birth-certificate data only; names appearing fewer than 5 times in a given year are suppressed for privacy; spelling variants are counted separately. For names that ranked outside the US top 100 before year 2000, only the years they reached the top 100 are shown — the chart may have gaps for less-popular historical names.
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Where in the US Is Declan Most Popular?
Average boy-name rank within each state across 2016–2025 SSA records. A lower number means the name appears closer to the top of that state's boys-name rankings — a per-capita measure that isn't biased toward large states. For Declan the strongest states are New Hampshire, Montana, Idaho.
Strongest boys-name states
| # | State | Avg rank | Births |
|---|---|---|---|
| 1 | New Hampshire | #51 | 239 |
| 2 | Montana | #53 | 172 |
| 3 | Idaho | #56 | 318 |
| 4 | Maine | #59 | 192 |
| 5 | Massachusetts | #61 | 1,001 |
| 6 | Alaska | #65 | 130 |
| 7 | Pennsylvania | #68 | 1,809 |
| 8 | Delaware | #68 | 142 |
| 9 | Wyoming | #73 | 74 |
| 10 | Colorado | #78 | 751 |
Weakest boys-name states
| # | State | Avg rank | Births |
|---|---|---|---|
| 1 | New Mexico | #245 | 72 |
| 2 | Mississippi | #201 | 160 |
| 3 | Texas | #201 | 1,857 |
| 4 | California | #187 | 2,171 |
| 5 | Alabama | #180 | 313 |
| 6 | Louisiana | #177 | 300 |
| 7 | Georgia | #163 | 732 |
| 8 | Hawaii | #152 | 73 |
| 9 | Nevada | #149 | 220 |
| 10 | Florida | #145 | 1,432 |
Source: SSA state-level baby-name dataset 2016–2025. States with fewer than 3 years of data for Declan in this window are excluded. Births < 5 in a given state-year are suppressed by SSA for privacy.
Looking for names like Declan?
A dedicated page with 60+ related names — spelling variants, rhymes, alliterations, same-origin matches, and shared meaning concepts — lives at its own URL so each kind of similarity gets a deeper treatment than fits here.
Compare Declan to Other Popular Names
Side-by-side popularity charts and crossover years for Declan against today's most popular boys-name peers (top 8 by US births in the last 10 years of SSA records).