Declan vs Isaac

Baby Name Comparison — 2026

Declan

Boy #131 Most Popular 2 Syllables

"man of prayer"

Origin: Irish Gaelic

Irish English American

✓ All Clear

Boy #40 Most Popular 3 Syllables

"He will laugh; laughter"

Origin: Hebrew

English Jewish Spanish French

✓ All Clear

Declan Rank #131

Isaac Rank #40

Isaac is more popular, ranked #40 vs #131 for Declan.

Is Declan or Isaac more popular?

Isaac is more popular, ranked #40 compared to Declan at #131 in the United States.

What do Declan and Isaac mean?

Declan means "man of prayer" (Irish Gaelic origin). Isaac means "He will laugh; laughter" (Hebrew origin).

Are Declan and Isaac boy or girl names?

Declan is primarily a boy name. Isaac is primarily a boy name.