Declan vs Leo

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 →

Leo

Boy #24 Most Popular 2 Syllables

Meaning

"lion-hearted, brave"

Origin: Latin

Cultural Roots

English Italian German French American Spanish

Quick Stats

Popularity Rank
#24
Total SSA Count
7,793
Syllables
2
Formality
Casual

Playground Safety Score

✓ All Clear
Full profile for Leo →

Popularity Comparison

Declan Rank #131
Leo Rank #24

Leo is more popular, ranked #24 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

Leo ___

  • Leo James
  • Leo Thomas
  • Leo Alexander
  • Leo Cole
  • Leo Grey
  • Leo Xavier

Sibling Name Ideas

Names that pair well as siblings.

If you choose Declan

Finn Liam Siobhan Aoife Rowan

If you choose Leo

Luna Isla Mia Oscar Violet

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 Leo more popular?

Leo is more popular, ranked #24 compared to Declan at #131 in the United States.

What do Declan and Leo mean?

Declan means "man of prayer" (Irish Gaelic origin). Leo means "lion-hearted, brave" (Latin origin).

Are Declan and Leo boy or girl names?

Declan is primarily a boy name. Leo is primarily a boy name.

More Comparisons

Leo vs Declan Declan vs Abraham Declan vs Evan Declan vs Amari Declan vs Bowen
← Full profile: Declan ← Full profile: Leo Browse all baby names