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Oisin

#4,659 in 2025Boys' name

Deer, through Ossian

Oisin has been given to 513 babies in the U.S. since 1991. In 2025 it ranked #4,659 of 13,926 boys’ names in use. Its peak year was 2020, with 31 recorded.

Babies named Oisin, 2025

1 in 151,000

Oisin over time, 1880–2025

Boys
01020304018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Oisin: meaning, origin, and history

Deer, through Ossian

Irish

What Oisin means

Oisin belongs to the name family reached through Oisin → Ossian. Its meaning is “deer”.

Origin, language, and formation

Oisin is used in English. Its origins include Irish.

Related names and everyday forms

Related names include Ossian.

American usage and historical context

In the United States, 513 boys were recorded with the name Oisin between 1991 and 2025. Its highest annual count was 31 in 2020; its best national rank was #3,545 in 2020.

Over 5 years its rank fell, from #3,545 in 2020 to #4,659 in 2025. Over 10 years its rank rose, from #5,665 in 2015 to #4,659 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Oisin?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 151,000
22 of 3,315,165 births
Among boys only
1 in 77,600
<0.01% of boys
Rank, 2025
#4,659
of 13,926 boys’ names in use
Coin-flip room size
104,451 kids
Even odds of a second one

Where Oisin sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 104,451 children born in 2025 and it's an even bet that one of them is another Oisin. In a class of 30 the chance is Under 1%.

When Oisins were born

Half of everyone ever recorded as Oisin was born before 2015 — so the typical Oisin is around 10 today.

Median birth year
2015
About 10 years old
Biggest decade
2010s
35.3% of all use
Born in the last 25 years
89.9%
A modern name
Recorded since 1950
513
People you could plausibly meet
Choose a decade

2010s — 35.3% of all recorded uses (181).

Is Oisin rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
−502
Places dropped
Rank vs 5 years ago
−1,114
Places dropped
Rank vs 10 years ago
+1,006
Places climbed
Births vs 10 years ago
1.38×
More babies than then
Share of its own peak
71.0%
Peak was 2020 (31)
Years since peak
5
Years
Year-to-year steadiness
Shifting
23.0% average annual change
Best rank ever
#3,545
2020

Spellings of Oisin

Oisin is not the most common spelling — Odin is, with 25.2% against Oisin's 0.97%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Oisin is used

Across 1910–2025, Oisin was most concentrated in California — about 1 in — boys, against 1 in 777,785 across all states with data. It was least common in New York (1 in —).

00 per 100,000

Most concentrated

  1. 1California1 in —
  2. 2Massachusetts1 in —
  3. 3New York1 in —

Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Oisin has too little recent state data to map, so this covers all years from 1910.

Oisin around the world

Where Oisin ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    1996–2025
    #517
    in 2025
  • Scotland
    1997–2025
    #262
    in 2025
  • Northern Ireland
    1997–2025
    #6
    in 2025
  • Ireland
    1964–2025
    #5
    in 2025
  • France
    2004–2024
    #5,943
    in 2024
  • Canada
    2008–2024
    #1,698
    in 2024
  • South Australia
    2003–2012
    #514
    in 2012

Popularity data from Office for National Statistics, National Records of Scotland, Northern Ireland Statistics and Research Agency, Central Statistics Office, Institut national de la statistique et des études économiques, Statistics Canada and Consumer and Business Services (South Australia). ONS, NRS, NISRA data under Open Government Licence v3.0. CSO, CBS SA data under CC BY 4.0. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence.

Oisin by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#4,659
Trend vs 5 yrs ago
Down 1,114
Best rank ever
#3,545
2020
Peak year
2020
31 that year
First recorded
1991
Last recorded
2025
All-time count
513
Count in 2025
22

Names similar to Oisin

Matched on shared beginnings and endings, similar length, and comparable popularity.

KasinMohsinMuhsinKaysinKarsinKysinJasinYassinDelsinYasinMasinTahsinTysinBrysinCasinJaxsinJaysinTaliesinChasinCarsinAasinJusinMaysinCaysin

Sibling names for Oisin

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Oisin

Top names of 2020, Oisin's peak yearThe 2020s in fullOther names that peaked in 2020Boys' names starting with OIrish Boy NamesIrish Mythology Names