Arlo vs Declan

Baby Name Comparison — 2026

Arlo

Boy #146 Most Popular 2 Syllables

"fortified hill"

Origin: Old English

English American Australian

✓ All Clear

Boy #131 Most Popular 2 Syllables

"man of prayer"

Origin: Irish Gaelic

Irish English American

✓ All Clear

Arlo Rank #146

Declan Rank #131

Declan is more popular, ranked #131 vs #146 for Arlo.

Is Arlo or Declan more popular?

Declan is more popular, ranked #131 compared to Arlo at #146 in the United States.

What do Arlo and Declan mean?

Arlo means "fortified hill" (Old English origin). Declan means "man of prayer" (Irish Gaelic origin).

Are Arlo and Declan boy or girl names?

Arlo is primarily a boy name. Declan is primarily a boy name.