Fionn
Fionn was given to 25 boys in 2025, #4,170 among boys’ names; 682 Americans have been recorded with it since 1973 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Fionn by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Fionn mean?
Wiktionary, Irish section
Fionn is “a male given name from Old Irish” Its etymology gives the sense “white, bright, fair, handsome” (find).
From Old Irish Finn, an epithet from the adjective find (“white, bright, fair, handsome”). Doublet of fionn.
/fʲũːn̪ˠ/
Meaning: Wiktionary, Irish section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Fionn?
#4,170 among boys’ names, 2025
Fionn fell from #3,541 in 2015 to #4,170 in 2025 among boys’ names; its share of boys born fell from 16.2 to 14.6 per million.
40 babies in 2018, the peak
Fionn peaked in 2018, when 40 boys were given it, #2,962 among boys’ names. The 25 births of 2025 are 63% of that peak.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2025 | 25 | #4,170 | 14.6 |
| 2024 | 22 | #4,601 | 12.8 |
| 2023 | 31 | #3,648 | 18.1 |
| 2022 | 28 | #3,919 | 16.0 |
| 2021 | 40 | #3,037 | 22.9 |
| 2020 | 23 | #4,311 | 13.3 |
| 2019 | 25 | #4,148 | 13.9 |
| 2018 | 40 | #2,962 | 22.0 |
| 2017 | 33 | #3,402 | 17.8 |
| 2016 | 29 | #3,714 | 15.3 |
Every recorded year (30)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2015 | 31 | #3,541 | 16.2 |
| 2014 | 24 | #4,169 | 12.5 |
| 2013 | 28 | #3,688 | 14.8 |
| 2012 | 37 | #3,071 | 19.5 |
| 2011 | 25 | #4,020 | 13.2 |
| 2010 | 25 | #4,030 | 13.0 |
| 2009 | 29 | #3,661 | 14.6 |
| 2008 | 29 | #3,674 | 14.2 |
| 2007 | 20 | #4,690 | 9.6 |
| 2006 | 18 | #4,924 | 8.8 |
| 2005 | 25 | #3,747 | 12.5 |
| 2004 | 16 | #5,081 | 8.1 |
| 2003 | 15 | #5,114 | 7.6 |
| 2002 | 11 | #6,216 | 5.7 |
| 2001 | 13 | #5,465 | 6.7 |
| 2000 | 16 | #4,644 | 8.1 |
| 1999 | 6 | #9,067 | 3.1 |
| 1998 | 5 | #10,133 | 2.6 |
| 1997 | 8 | #6,813 | 4.2 |
| 1973 | 5 | #5,349 | 3.2 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Fionn a boy’s or a girl’s name?
Fionn has been recorded only for boys: SSA lists no girls with the name in 30 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Fionn: the SSA national file counts each sex separately.
How many people are named Fionn, and how old are they?
An estimated 674 Americans named Fionn and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 12 years old and half are between 7 and 18. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 583 people named Fionn (24 women and girls, 559 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 514 born in the U.S. The Census count is 13% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 6 names spelled alike, given to 38,713 babies since 1880, Fionn is the third most given (1.8% of them). In 2025 it was given to 25 of their 1,900 babies (1.3%), the fifth most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Fionn
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Fionn and names like it
- Compare Fionn and FinnBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2010sFionn peaked in 2018.
- California’s most given namesThe state where SSA recorded the most babies named Fionn since 1910.
- The top names of 2018The year the most babies were named Fionn.
- The names of Generation AlphaMost people named Fionn alive today were born 2013-2025.
- Names starting with FMost given first.