Declining since 2014, #7,679 for boys today.
Popularity of Deaglan since 1999
Babies named Deaglan per year in U.S. Social Security records.
Data table (by decade)
| Decade | Boys |
|---|---|
| 1990s | 5 |
| 2000s | 92 |
| 2010s | 355 |
| 2020s | 82 |
Meaning & origin
Deaglan is the Irish-language spelling of Declan, a name that has seen moderate use in the United States since first appearing in official records in 1999. Its peak popularity came in 2015, when it ranked highest, but it has been on a gradual decline since 2014. The name's one-in-170,808 frequency for boys in 2025 reflects its relatively rare but steady presence. Despite its Irish roots, Deaglan has no dominant state preference and remains a distinctive choice outside of Ireland.
Deaglan is the Irish form of the Latin name Declanus, derived from the Old Irish root 'dech' meaning 'good' or 'excellent'. Saint Declan was an early Irish saint and bishop, said to have predated Saint Patrick in bringing Christianity to Ireland. The spelling Deaglan reflects a more literal Irish orthography, though it remains less common than the anglicized Declan.
Nicknames & variants
Nicknames: Dec, Decky, Dee
Variants: Declan, Deaglán
Sibling names for Deaglan
Names that share Deaglan's style, for a brother or sister.
