Marcello vs Guillermo

Baby Name Comparison — 2026

Guillermo

Boy #833 Most Popular 3 Syllables

Meaning

"resolute protector"

Origin: Old High German wil (will) + helm (protection)

Cultural Roots

Spanish Latin American Filipino Portuguese

Quick Stats

Popularity Rank
#833
Total SSA Count
297
Syllables
3
Formality
Formal

Playground Safety Score

✓ All Clear
Full profile for Guillermo →

Popularity Comparison

Marcello Rank #1,004
Guillermo Rank #833

Guillermo is more popular, ranked #833 vs #1004 for Marcello.

Frequently Asked Questions

Is Marcello or Guillermo more popular?

Guillermo is more popular, ranked #833 compared to Marcello at #1004 in the United States.

What do Marcello and Guillermo mean?

Marcello means "little warrior, young Mars" (Latin origin). Guillermo means "resolute protector" (Old High German wil (will) + helm (protection) origin).

Are Marcello and Guillermo boy or girl names?

Marcello is primarily a boy name. Guillermo is primarily a boy name.

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← Full profile: Marcello ← Full profile: Guillermo Browse all baby names