Kieran vs Theodore

Baby Name Comparison — 2026

Kieran

Boy #441 Most Popular 2 Syllables

Meaning

"little dark one"

Origin: Irish Gaelic (ciar + -án)

Cultural Roots

Irish Scottish English

Quick Stats

Popularity Rank
#441
Total SSA Count
713
Syllables
2
Formality
Moderate
Nicknames
Kier

Playground Safety Score

✓ All Clear
Full profile for Kieran →

Popularity Comparison

Kieran Rank #441
Theodore Rank #4

Theodore is more popular, ranked #4 vs #441 for Kieran.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kieran ___

  • Kieran James
  • Kieran Patrick
  • Kieran Michael
  • Kieran Thomas
  • Kieran Francis
  • Kieran Joseph

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 Kieran

Declan Ronan Siobhan Niamh Cormac

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 Kieran or Theodore more popular?

Theodore is more popular, ranked #4 compared to Kieran at #441 in the United States.

What do Kieran and Theodore mean?

Kieran means "little dark one" (Irish Gaelic (ciar + -án) origin). Theodore means "divine gift" (Greek origin).

Are Kieran and Theodore boy or girl names?

Kieran is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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