Keira vs Theodore

Baby Name Comparison — 2026

Keira

Girl #609 Most Popular 2 Syllables

Meaning

"dark one, black-haired one"

Origin: Irish Gaelic

Cultural Roots

Irish Scottish English American

Quick Stats

Popularity Rank
#609
Total SSA Count
492
Syllables
2
Formality
Moderate
Nicknames
Kei, Kee

Playground Safety Score

✓ All Clear
Full profile for Keira →

Popularity Comparison

Keira Rank #609
Theodore Rank #4

Theodore is more popular, ranked #4 vs #609 for Keira.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Keira ___

  • Keira Rose
  • Keira Elizabeth
  • Keira Anne
  • Keira Grace
  • Keira Louise
  • Keira Marie

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 Keira

Niamh Aoife Siobhan Declan Cillian

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 Keira or Theodore more popular?

Theodore is more popular, ranked #4 compared to Keira at #609 in the United States.

What do Keira and Theodore mean?

Keira means "dark one, black-haired one" (Irish Gaelic origin). Theodore means "divine gift" (Greek origin).

Are Keira and Theodore boy or girl names?

Keira is primarily a girl name. Theodore is primarily a boy name.

More Comparisons

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