Arlo vs William

Baby Name Comparison — 2026

Arlo

Boy #146 Most Popular 2 Syllables

"fortified hill"

Origin: Old English

English American Australian

✓ All Clear

Boy #10 Most Popular 3 Syllables

"resolute protector, strong-willed guardian"

Origin: Germanic

English German French

✓ All Clear

Arlo Rank #146

William Rank #10

William is more popular, ranked #10 vs #146 for Arlo.

Is Arlo or William more popular?

William is more popular, ranked #10 compared to Arlo at #146 in the United States.

What do Arlo and William mean?

Arlo means "fortified hill" (Old English origin). William means "resolute protector, strong-willed guardian" (Germanic origin).

Are Arlo and William boy or girl names?

Arlo is primarily a boy name. William is primarily a boy name.