Fionn
Boy nameFionn has been given to 682 babies in the U.S. since 1973. It peaked in 2018.
Popularity over time births per year, 1880–2025
Total babies
682
Peak year
2018 (40 babies)
Rank in 2025
Below top 1000
First recorded
1973
10-year trend
▼ -19%
Gender split
All boys
Spellings & variants
Names one letter away from Fionn — alternate spellings parents actually use.
Names with a similar vibe
Same primary gender, peaked around the same years, and roughly as common as Fionn.
FAQ
How popular is the name Fionn?
Fionn has been given to 682 babies in the U.S. since 1973. It ranked below the top 1000 in 2025.
When did the name Fionn peak?
Fionn peaked in 2018, when 40 babies were given the name.
Is Fionn a girl or boy name?
Fionn is primarily a boy name (100% of babies named Fionn are boys).
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