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