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