Fionn
Boy name · Celtic · Gaelic · Irish
Meaningfair, white · Irish
- US rank
- #4,139
- Syllables
- 1
- Peak
- #2,943 in 2018
25 babies were named Fionn in the US in 2025. It has climbed 136 places in five years.
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US births per million boys, 1973–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Fionn you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 68,493 baby boys born in the US in 2025 was named Fionn, 25 babies in all. In a typical school of 500 kids, your Fionn would very likely be the only one.
- HistoryFionn first shows up in US birth records in 1973, the first year at least 5 babies got it. It has been in use for 52 years since.
- Best yearIts best year was 2018, when it reached #2,943.
- TrendFionn has climbed 136 places in the US rankings over the last five years and now sits at #4,139. Fast risers like this often keep climbing, so expect to hear it more.
- MeaningIn Irish, Fionn means “fair, white”. Our records link it to Celtic, Gaelic and Irish roots.
About the name Fionn
Fionn is a boy name of Celtic, Gaelic and Irish origin meaning “fair, white”. It has 5 letters and 1 syllable, starting with F and ending in “-onn”. US birth records list Fionn for boys from 1973 to 2025, in 30 of those 53 years. Its best year was 2018, when it ranked #2,943 among boy names. In 2025 it ranked #4,139, with 25 babies.
Origin:Celtic namesGaelic namesIrish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1970s | 0.5 | 2,187,500 boys |
| 1990s | 1.0 | 1,010,101 boys |
| 2000s | 9.6 | 104,275 boys |
| 2010s | 16 | 63,211 boys |
| 2020s | 16 | 61,412 boys |
Other spellings of Fionn
More Celtic boy names
- Unisex name: Owen · well-born
- Unisex name: Logan · little hollow
- Unisex name: Rowan · little red-haired one
- Unisex name: Nolan · descendant of Nuallán
- Unisex name: Cameron · crooked nose
- Boy name: Ian · God is gracious
- Unisex name: Gael · a Gael
- Boy name: Arthur · possibly bear
Questions about the name Fionn
What does the name Fionn mean?
Fionn means “fair, white” in Irish.
What is the origin of the name Fionn?
Fionn has Celtic, Gaelic, Irish roots in our records. Other Celtic names include Owen, Logan, Rowan.
Is Fionn a boy or girl name?
Fionn is a boy name.
How popular is the name Fionn?
Fionn ranked #4,139 for US boys in 2025, given to 25 babies. Its best year was 2018 (#2,943).