| Oisin | Tynan | |
|---|---|---|
| Meaning | Little deer | dark, dusky |
| Origin | Irish | irish |
| Gender | Boy | Boy |
| Pronunciation | uh-SHEEN | TY-nuhn |
| Syllables | 2 | 2 |
| First appeared | 1991 | 0 |
| Peak year | 2020 (31) | 1994 (38) |
| In 2025 | 22 | 0 |
| Trend | Rising | Declining |
Source: US Social Security Administration.
| Decade | Oisin | Tynan |
|---|---|---|
| 2020s | 157 | 30 |
| 2010s | 181 | 92 |
| 2000s | 132 | 240 |
| 1990s | 43 | 260 |
| 1980s | 0 | 109 |
Oisín means “little deer” or “fawn.” He is the poet-warrior of Irish legend.
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.)
Oisin is more popular than Tynan today: about 22 US babies were given the name Oisin in 2025, compared with 0 named Tynan.
Oisin means Little deer (Irish origin), while Tynan means dark, dusky (irish origin).
In US records, Oisin first appears in 1991 and Tynan in 0, so Tynan has the longer recorded history.