Declan vs Theo

Baby Name Comparison — 2026

Declan

Boy #131 Most Popular 2 Syllables

"man of prayer"

Origin: Irish Gaelic

Irish English American

✓ All Clear

Boy #80 Most Popular 2 Syllables

"gift of God"

Origin: Greek (theodoros)

English Greek French German American

✓ All Clear

Declan Rank #131

Theo Rank #80

Theo is more popular, ranked #80 vs #131 for Declan.

Is Declan or Theo more popular?

Theo is more popular, ranked #80 compared to Declan at #131 in the United States.

What do Declan and Theo mean?

Declan means "man of prayer" (Irish Gaelic origin). Theo means "gift of God" (Greek (theodoros) origin).

Are Declan and Theo boy or girl names?

Declan is primarily a boy name. Theo is primarily a boy name.