Oisin vs Theodore

Baby Name Comparison — 2026

Oisin

Boy #4,145 Most Popular 2 Syllables

Meaning

"little deer, fawn"

Origin: Old Irish

Cultural Roots

Irish Celtic Scottish

Quick Stats

Popularity Rank
#4,145
Total SSA Count
26
Syllables
2
Formality
Moderate
Nicknames
Osh, Shin

Playground Safety Score

✓ All Clear
Full profile for Oisin →

Popularity Comparison

Oisin Rank #4,145
Theodore Rank #4

Theodore is more popular, ranked #4 vs #4145 for Oisin.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Oisin ___

  • Oisin Patrick
  • Oisin Brendan
  • Oisin Cormac
  • Oisin Finn
  • Oisin James
  • Oisin Liam

Theodore ___

  • Theodore James
  • Theodore William
  • Theodore Alexander
  • Theodore John
  • Theodore Henry
  • Theodore Arthur

Sibling Name Ideas

Names that pair well as siblings.

If you choose Oisin

Finn Cormac Aoife Saoirse Brigid

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Oisin or Theodore more popular?

Theodore is more popular, ranked #4 compared to Oisin at #4145 in the United States.

What do Oisin and Theodore mean?

Oisin means "little deer, fawn" (Old Irish origin). Theodore means "divine gift" (Greek origin).

Are Oisin and Theodore boy or girl names?

Oisin is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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