Oisin
Boy name · Celtic · Gaelic · Irish
Meaninglittle deer · Irish
- US rank
- #4,539
- Syllables
- 2
- Peak
- #3,497 in 2020
22 babies were named Oisin in the US in 2025. It has dropped 1,042 places in five years.
Found on lists
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US births per million boys, 1991–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Oisin you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 77,519 baby boys born in the US in 2025 was named Oisin, 22 babies in all. In a typical school of 500 kids, your Oisin would very likely be the only one.
- HistoryOisin first shows up in US birth records in 1991, the first year at least 5 babies got it. It has been in use for 34 years since.
- Best yearIts best year was 2020, when it reached #3,497.
- Then vs nowOisin is 2.8× more common today than it was in 2000. In 2000 it was given to about 1 in 217,391 baby boys; in 2025, about 1 in 77,519.
- TrendOisin has slipped 1,042 places over the last five years and now sits at #4,539. Good news if you want a familiar name that fewer kids will share.
- MeaningIn Irish, Oisin means “little deer”. Our records link it to Celtic, Gaelic and Irish roots.
About the name Oisin
Oisin is a boy name of Celtic, Gaelic and Irish origin meaning “little deer”. It has 5 letters and 2 syllables, starting with O and ending in “-sin”. US birth records list Oisin for boys from 1991 to 2025, in 31 of those 35 years. Its best year was 2020, when it ranked #3,497 among boy names. In 2025 it ranked #4,539, with 22 babies.
Origin:Celtic namesGaelic namesIrish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1990s | 2.5 | 401,786 boys |
| 2000s | 6.6 | 151,057 boys |
| 2010s | 9.7 | 103,627 boys |
| 2020s | 15 | 66,007 boys |
More Celtic boy names
- Unisex name: Owen · well-born
- Unisex name: Logan · little hollow
- Unisex name: Rowan · little red-haired one
- Unisex name: Nolan · descendant of Nuallán
- Unisex name: Cameron · crooked nose
- Boy name: Ian · God is gracious
- Unisex name: Gael · a Gael
- Boy name: Arthur · possibly bear
Questions about the name Oisin
What does the name Oisin mean?
Oisin means “little deer” in Irish.
What is the origin of the name Oisin?
Oisin has Celtic, Gaelic, Irish roots in our records. Other Celtic names include Owen, Logan, Rowan.
Is Oisin a boy or girl name?
Oisin is a boy name.
How popular is the name Oisin?
Oisin ranked #4,539 for US boys in 2025, given to 22 babies. Its best year was 2020 (#3,497).