Oisin

♂ Boy

Pronounced uh-SHEEN /əˈʃin/Medium

Meaning: From Irish Oisín — from os, 'deer' — 'little deer, fawn'; the great poet-warrior of legendHigh

In 30 seconds: A little fawn of legend: Oisin means 'little deer' — the greatest poet-warrior of Irish myth, son of Finn. Lyrical, ancient, and gentle-strong.

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Origin HighIrish

MeaningFrom Irish Oisín — from os, 'deer' — 'little deer, fawn'; the great poet-warrior of legend

U.S. rank (2025)#4660 ↘ Falling

2025 U.S. births22 boys (0.00% of U.S. boys)

Peak year2020

Total births (all-time)≈ 513

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Oisin comes from Irish Oisín — from os, 'deer' — 'little deer, fawn'. The great poet and warrior of the Fenian Cycle (son of Finn), he's central to Irish legend; the name is lyrical and deep-rooted.

In the U.S. it appears in Irish families. Rare, little-deer at the root, and legendary.

Did you know? Oisín, 'little deer', was the legendary poet-warrior of Irish myth who journeyed to Tír na nÓg, the land of eternal youth — son of Finn mac Cumhaill.

Overall data confidence 82%

Behind the Name — Oisín — etymology

Variations

OisínOssianOsheen

Nicknames

Osh

Famous Bearers

★Oisín Mac Fionn
legendary Irish warrior-poet of the Fenian Cycle, son of Fionn mac Cumhaill, in Irish mythology
★Oisín Murphy (1999-)
Irish champion jockey, multiple winner of the British flat racing championship

If you like Oisin…

Finn— his legendary father's name

Cian— a fellow Irish classic

Ronan— a companion Irish name

Orin— echoes that soft -in sound

Torin— echoes that soft -in sound

Explore names like Oisin

By themenature irish mythological

By meaningWarrior

All themes →All meanings →All origins →

Frequently Asked

What does the name Oisin mean?

Oisin is Irish for 'little deer, fawn' — the legendary poet-warrior.

How do you pronounce Oisin?

It's said uh-SHEEN /əˈʃin/ — two syllables, stress on the second.

Is Oisin a boy or girl name?

Oisin is a boy's name.

How popular is Oisin?

Oisin is a rare name in the U.S.