Declan vs Theodore

Baby Name Comparison — 2026

Declan

Boy #131 Most Popular 2 Syllables

Meaning

"man of prayer"

Origin: Irish Gaelic

Cultural Roots

Irish English American

Quick Stats

Popularity Rank
#131
Total SSA Count
2,758
Syllables
2
Formality
Moderate
Nicknames
Dec, Decs

Playground Safety Score

✓ All Clear
Full profile for Declan →

Popularity Comparison

Declan Rank #131
Theodore Rank #4

Theodore is more popular, ranked #4 vs #131 for Declan.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Declan ___

  • Declan James
  • Declan Patrick
  • Declan Michael
  • Declan Ryan
  • Declan Thomas
  • Declan Cole

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 Declan

Finn Liam Siobhan Aoife Rowan

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 Declan or Theodore more popular?

Theodore is more popular, ranked #4 compared to Declan at #131 in the United States.

What do Declan and Theodore mean?

Declan means "man of prayer" (Irish Gaelic origin). Theodore means "divine gift" (Greek origin).

Are Declan and Theodore boy or girl names?

Declan is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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