| Fionn | Tynan | |
|---|---|---|
| Meaning | Fair, white | dark, dusky |
| Origin | Irish | irish |
| Gender | Boy | Boy |
| Pronunciation | FYUN | TY-nuhn |
| Syllables | 1 | 2 |
| First appeared | 1973 | 0 |
| Peak year | 2018 (40) | 1994 (38) |
| In 2025 | 25 | 0 |
| Trend | Steady | Declining |
Source: US Social Security Administration.
| Decade | Fionn | Tynan |
|---|---|---|
| 2020s | 169 | 30 |
| 2010s | 297 | 92 |
| 2000s | 192 | 240 |
| 1990s | 19 | 260 |
| 1980s | 0 | 109 |
| 1970s | 5 | 0 |
Fionn means “fair” or “white.” Fionn mac Cumhaill leads the warriors of the Fianna.
Anglicized from Irish O Teimhneain, from a diminutive of Old Irish 'teimhean' meaning 'dark, dusky, gloom'. (A minority source instead links it to O Tadhgain, 'poet', but the 'dark' derivation is the one usually given.)
Fionn is more popular than Tynan today: about 25 US babies were given the name Fionn in 2025, compared with 0 named Tynan.
Fionn means Fair, white (Irish origin), while Tynan means dark, dusky (irish origin).
In US records, Fionn first appears in 1973 and Tynan in 0, so Tynan has the longer recorded history.