Keiran vs Theodore

Baby Name Comparison — 2026

Keiran

Boy #5,092 Most Popular 2 Syllables

Meaning

"dark one, little dark one"

Origin: Irish

Cultural Roots

Irish Scottish English Australian

Quick Stats

Popularity Rank
#5,092
Total SSA Count
19
Syllables
2
Formality
Moderate
Nicknames
Kei, Keri

Playground Safety Score

✓ All Clear
Full profile for Keiran →

Popularity Comparison

Keiran Rank #5,092
Theodore Rank #4

Theodore is more popular, ranked #4 vs #5092 for Keiran.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Keiran ___

  • Keiran James
  • Keiran Patrick
  • Keiran Thomas
  • Keiran Michael
  • Keiran Liam
  • Keiran Sean

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 Keiran

Declan Fiona Niamh Ronan Aoife

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 Keiran or Theodore more popular?

Theodore is more popular, ranked #4 compared to Keiran at #5092 in the United States.

What do Keiran and Theodore mean?

Keiran means "dark one, little dark one" (Irish origin). Theodore means "divine gift" (Greek origin).

Are Keiran and Theodore boy or girl names?

Keiran is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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← Full profile: Keiran ← Full profile: Theodore Browse all baby names