Colin vs Arlo

Baby Name Comparison — 2026

Colin

Boy #335 Most Popular 2 Syllables

"young dog, whelp"

Origin: Irish/Scottish Gaelic

English Irish Scottish American

✓ All Clear

Boy #146 Most Popular 2 Syllables

"fortified hill"

Origin: Old English

English American Australian

✓ All Clear

Colin Rank #335

Arlo Rank #146

Arlo is more popular, ranked #146 vs #335 for Colin.

Is Colin or Arlo more popular?

Arlo is more popular, ranked #146 compared to Colin at #335 in the United States.

What do Colin and Arlo mean?

Colin means "young dog, whelp" (Irish/Scottish Gaelic origin). Arlo means "fortified hill" (Old English origin).

Are Colin and Arlo boy or girl names?

Colin is primarily a boy name. Arlo is primarily a boy name.