Declining since 2022, #4,139 for boys today.
Popularity of Fionn since 1973
Babies named Fionn per year in U.S. Social Security records.
Data table (by decade)
| Decade | Boys |
|---|---|
| 1970s | 5 |
| 1980s | 0 |
| 1990s | 19 |
| 2000s | 192 |
| 2010s | 297 |
| 2020s | 169 |
Meaning & origin
Fionn is an Irish name rooted in mythology, borne by the legendary hero Fionn mac Cumhaill, leader of the Fianna. The name stems from the Old Irish word 'find', meaning 'fair' or 'bright', often describing a fair-haired person. In the United States, Fionn has seen modest modern use, first recorded in 1973. As of 2025, it ranked 4,139 with approximately 1 in 68,323 boys receiving the name. Its popularity peaked in 2021, but it has been declining since 2022. The name carries strong cultural resonance in Ireland and among the Irish diaspora, though it is not among the most common Irish names in America. Fionn remains a distinctive choice that connects a child to a rich heritage of storytelling and history.
Fionn is the Irish equivalent of the name Finn, derived from the Old Irish word 'find' meaning 'fair, white, bright'. In Irish mythology, Fionn mac Cumhaill (Finn McCool) is a legendary hero and leader of the warrior band the Fianna. The name has been used in Ireland for centuries and remains popular there, with occasional use in other English-speaking countries.
“Fionn” around the world
Where Fionn lands in the latest official birth statistics abroad, matched to the U.S. spelling.
Ireland
#6
in 2025
Sources: CSO Ireland (Ireland).
Nicknames & variants
Nicknames: Finn
Sibling names for Fionn
Names that share Fionn's style, for a brother or sister.
