Fionn
- Gender
- Boy
- Say it
- FIN
- Origin
- Irish
- UK rank, 2025
- #412 for boys
- US rank, 2025
- #4,138 for boys
Big in Northern Ireland
Fionn is a boys' name of Irish origin, meaning “fair, white”. In 2025 it ranked 412th for boys in the UK (111 babies) and 4,138th for boys in the US (25 babies).
What does Fionn mean?
Irish
“fair, white”
Fionn mac Cumhaill is the legendary leader of the Fianna warrior band in Irish mythology.
Is Fionn a girl's or a boy's name?
Fionn is a boys' name. In 2025, it was given to 111 boys in the UK and 25 boys in the US. Too few girls were given it to be listed.
How popular is Fionn in the UK?
- Rank in 2025
- #412among boys
- Babies in 2025
- 111about 1 in 2,700 boys
- Five-year trend
- Steadydown 5% in five years
- Same name in a class
- under 1%chance among 15 boys
In 2025, 111 boys in the UK were named Fionn, making it the 412th most popular name for boys. Five years earlier, in 2020, it was 370th. Its busiest year was 2021, with 135 boys.
It has been given to fewer boys each year for the last 4 years. 2025 had fewer boys named Fionn than any year since 2014.
Half of all the boys named Fionn in the UK since 1996 were born between 2010 and 2021, the years shaded on the chart below.
In 2025, 1,082 boys in the UK were given Fionn or a name that sounds the same. With every name's spellings counted this way, that ranks #54, up from #412 for this spelling alone.
Girls were 29% of the babies named Fionn in the UK in 1996, and under 1% in 2023.
Among boys in 2025, it was 658th in England and Wales, 278th in Scotland and 44th in Northern Ireland.
Fionn in the UK, year by year
| Year | Boys | Rank |
|---|---|---|
| 2025 | 111 | #412 |
| 2024 | 116 | #402 |
| 2023 | 126 | #374 |
| 2022 | 134 | #358 |
| 2021 | 135 | #370 |
| 2020 | 134 | #370 |
| 2019 | 126 | #388 |
| 2018 | 112 | #424 |
| 2017 | 124 | #405 |
| 2016 | 123 | #405 |
| 2015 | 121 | #394 |
| 2014 | 98 | #465 |
| 2013 | 95 | #470 |
| 2012 | 78 | #537 |
| 2011 | 95 | #449 |
| 2010 | 73 | #532 |
| 2009 | 67 | #561 |
| 2008 | 74 | #525 |
| 2007 | 71 | #516 |
| 2006 | 74 | #477 |
| 2005 | 51 | #576 |
| 2004 | 51 | #558 |
| 2003 | 44 | #582 |
| 2002 | 35 | #625 |
| 2001 | 19 | #949 |
| 2000 | 20 | #882 |
| 1999 | 22 | #807 |
| 1998 | 13 | #1,112 |
| 1997 | 30 | #625 |
| 1996 | 15 | #979 |
How popular is Fionn in the US?
- Rank in 2025
- #4,138among boys
- Babies in 2025
- 25about 1 in 68,000 boys
- Five-year trend
- Steadydown 11% in five years
- Same name in a class
- under 1%chance among 15 boys
In 2025, 25 boys in the US were named Fionn, making it the 4,138th most popular name for boys. Five years earlier, in 2020, it was 4,271st. Its busiest year was 2018, with 40 boys. It first appears in the records in 1973.
Half of all the boys named Fionn in the US since 1880 were born between 2008 and 2019, the years shaded on the chart below.
In 2025, 1,803 boys in the US were given Fionn or a name that sounds the same. With every name's spellings counted this way, that ranks #222, up from #4,138 for this spelling alone.
Fionn in the US, year by year
| Year | Boys | Rank |
|---|---|---|
| 2025 | 25 | #4,138 |
| 2024 | 22 | #4,567 |
| 2023 | 31 | #3,627 |
| 2022 | 28 | #3,876 |
| 2021 | 40 | #3,020 |
| 2020 | 23 | #4,271 |
| 2019 | 25 | #4,110 |
| 2018 | 40 | #2,942 |
| 2017 | 33 | #3,376 |
| 2016 | 29 | #3,680 |
| 2015 | 31 | #3,512 |
| 2014 | 24 | #4,135 |
| 2013 | 28 | #3,659 |
| 2012 | 37 | #3,057 |
| 2011 | 25 | #3,992 |
| 2010 | 25 | #3,993 |
| 2009 | 29 | #3,637 |
| 2008 | 29 | #3,643 |
| 2007 | 20 | #4,638 |
| 2006 | 18 | #4,861 |
| 2005 | 25 | #3,706 |
| 2004 | 16 | #5,002 |
| 2003 | 15 | #5,030 |
| 2002 | 11 | #6,081 |
| 2001 | 13 | #5,383 |
| 2000 | 16 | #4,567 |
| 1999 | 6 | #8,697 |
| 1998 | 5 | #9,623 |
| 1997 | 8 | #6,612 |
| 1996 | 0 | – |
| 1995 | 0 | – |
| 1994 | 0 | – |
| 1993 | 0 | – |
| 1992 | 0 | – |
| 1991 | 0 | – |
| 1990 | 0 | – |
| 1989 | 0 | – |
| 1988 | 0 | – |
| 1987 | 0 | – |
| 1986 | 0 | – |
| 1985 | 0 | – |
| 1984 | 0 | – |
| 1983 | 0 | – |
| 1982 | 0 | – |
| 1981 | 0 | – |
| 1980 | 0 | – |
| 1979 | 0 | – |
| 1978 | 0 | – |
| 1977 | 0 | – |
| 1976 | 0 | – |
| 1975 | 0 | – |
| 1974 | 0 | – |
| 1973 | 5 | #5,099 |
Names like Fionn
Names given in the same years and the same naming tradition, with a similar sound.
Kayden Ronan Aiden Kian Brody Conan Caelan Declan Keegan Darragh Flynn Brayden
Other spellings of Fionn
Names related to Fionn
More Irish names
Oscar Rowan Rory Maeve Ryan Nolan Quinn Orla Cody Erin Connor Casey Kennedy Callan Lennon Cillian
Sources
Figures from Baby names in England and Wales (Office for National Statistics), Babies' first names (National Records of Scotland), Baby names (Northern Ireland Statistics and Research Agency) and Popular Baby Names (US Social Security Administration). Nameling last updated them on 20 October 2026. How the figures are worked out, and the data to download.
To cite this page: Nameling, “Fionn: name meaning, origin and popularity”, https://www.nameling.co.uk/names/fionn, updated 20 October 2026.