William vs Arlo

Baby Name Comparison — 2026

William

Boy #10 Most Popular 3 Syllables

"resolute protector, strong-willed guardian"

Origin: Germanic

English German French

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Boy #146 Most Popular 2 Syllables

"fortified hill"

Origin: Old English

English American Australian

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William Rank #10

Arlo Rank #146

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

Is William or Arlo more popular?

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

What do William and Arlo mean?

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

Are William and Arlo boy or girl names?

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