boy name · Irish origin
Fionn
/ FYUN /
Meaning
Fionn means Fair, white (Irish).
Gender
Boy
Origin
Irish
Pronunciation
FYUN
Popularity
#4171 · U.S. boys (2025)
Popularity of Fionn in the US, 1880–2025
Fionn first appears in US records in 1973. It peaked in 2018, when 40 boys were given the name; in 2025 there were 25.
Source: US Social Security Administration.
What does Fionn mean?
Fionn means “fair” or “white.” Fionn mac Cumhaill leads the warriors of the Fianna.
Frequently asked questions
What does the name Fionn mean?
Fionn means Fair, white. Fionn means “fair” or “white.” Fionn mac Cumhaill leads the warriors of the Fianna.
What is the origin of the name Fionn?
Fionn is of Irish origin.
How do you pronounce Fionn?
Fionn is pronounced “FYUN.”
Is Fionn a boy or a girl name?
Fionn is most commonly used as a boy name.
How popular is the name Fionn?
In 2025, Fionn ranked #4171 among boys’ names in the United States, according to U.S. Social Security Administration data.
When was the name Fionn most popular?
Fionn was most popular in 2018, when about 40 US babies were given the name that year, according to US Social Security Administration records.