Fionn

♂ Boy

Pronounced FYUN /ˈfjʊn/Medium

Meaning: From Irish fionn, 'fair, white, bright' — the legendary hero Fionn mac Cumhaill (Finn McCool)High

In 30 seconds: Fair and legendary: Fionn is Irish for 'fair, bright' — the great hero Fionn mac Cumhaill. Storied, strong, and proud.

💕 Browse more names

Origin HighIrish

MeaningFrom Irish fionn, 'fair, white, bright' — the legendary hero Fionn mac Cumhaill (Finn McCool)

U.S. rank (2025)#4171 ↗ Rising

2025 U.S. births25 boys (0.00% of U.S. boys)

Peak year2018

Total births (all-time)≈ 682

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Fionn comes from Irish fionn, 'fair, white, bright' — the name of Ireland's greatest legendary hero, Fionn mac Cumhaill, leader of the Fianna warriors. A storied, proud name (said 'FYUN').

In the U.S. it appears in Irish families. Rare, fair-bright at the root, and storied.

Did you know? Fionn means 'fair, white, bright' in Irish — borne by the legendary warrior-poet Fionn mac Cumhaill (Finn McCool), leader of the Fianna; storied and strong (said 'FYUN').

Overall data confidence 82%

Behind the Name — Fionn — etymology

Variations

FinnFionnghalFinnian

Nicknames

Finn

Famous Bearers

Famous bearers coming soon.

If you like Fionn…

Finn— the anglicized form

Finnian— a fellow Finn- name

Ronan— a companion Irish name

Cian— another Irish classic

Explore names like Fionn

By themeirish mythological

By meaningLight Beauty Wind / Air

All themes →All meanings →All origins →

Frequently Asked

What does the name Fionn mean?

Fionn is Irish for 'fair, white, bright' — the legendary hero Fionn mac Cumhaill.

How do you pronounce Fionn?

It's said FYUN /ˈfjʊn/ — a single syllable.

Is Fionn a boy or girl name?

Fionn is a boy's name.

How popular is Fionn?

Fionn is a rare name in the U.S.